diff --git a/app/admin-app.tsx b/app/admin-app.tsx
index 6b6cd87..3e19eb3 100644
--- a/app/admin-app.tsx
+++ b/app/admin-app.tsx
@@ -2927,6 +2927,7 @@ type ProjectTaskItem = {
   task_chat_id: string;
   recovery_enabled: number;
   recovery_due_at: string;
+  dist_total: number;
   recovery_submitted: number;
 };
 
@@ -3025,7 +3026,10 @@ function ProjectSection({
   }, [project.id, setToast]);
 
   const tasksSignature = tasks
-    .map((task) => `${task.id}:${task.claimed_quantity}:${task.status}`)
+    .map(
+      (task) =>
+        `${task.id}:${task.dist_total}:${task.dist_submitted}:${task.status}`,
+    )
     .join("|");
 
   useEffect(() => {
@@ -3266,11 +3270,11 @@ function ProjectSection({
                               </span>
                             </td>
                             <td>
-                              {task.claimed_quantity} / {task.quantity}
+                              {task.dist_total} / {task.quantity}
                             </td>
                             <td>
                               {Number(task.recovery_enabled) === 1
-                                ? `已收 ${task.recovery_submitted} / ${task.claimed_quantity}`
+                                ? `已收 ${task.recovery_submitted} / ${task.dist_total}`
                                 : "—"}
                             </td>
                             <td>
@@ -3937,7 +3941,7 @@ function OverviewPage({
     {
       label: "正在分发任务",
       value: stats.activeTasks,
-      hint: `${tasks.reduce((sum, task) => sum + task.claimed_quantity, 0)} 篇已被领取`,
+      hint: `${tasks.reduce((sum, task) => sum + (task.dist_total ?? 0), 0)} 篇已被领取`,
       tone: "green",
     },
     {
@@ -4006,7 +4010,7 @@ function OverviewPage({
             <i />
             <div className="workflow-step active">
               <span>02</span>
-              <div><strong>KOC领取</strong><small>{tasks.reduce((sum, task) => sum + task.claimed_quantity, 0)} 篇</small></div>
+              <div><strong>KOC领取</strong><small>{tasks.reduce((sum, task) => sum + (task.dist_total ?? 0), 0)} 篇</small></div>
             </div>
             <i />
             <div className="workflow-step">
@@ -4036,7 +4040,7 @@ function OverviewPage({
           </div>
           <div className="task-mini-list">
             {tasks.map((task) => {
-              const progress = Math.round((task.claimed_quantity / task.quantity) * 100);
+              const progress = Math.round(((task.dist_total ?? 0) / task.quantity) * 100);
               return (
                 <article key={task.id}>
                   <div className="task-mini-top">
@@ -4053,7 +4057,7 @@ function OverviewPage({
                   </div>
                   <div className="progress"><span style={{ width: `${progress}%` }} /></div>
                   <div className="task-mini-meta">
-                    <span>{task.claimed_quantity}/{task.quantity} 篇已领取</span>
+                    <span>{task.dist_total ?? 0}/{task.quantity} 篇已领取</span>
                     <span>{formatDate(task.due_at)}截止</span>
                   </div>
                 </article>
@@ -4400,7 +4404,7 @@ function TaskRowCard({
             <span className="panel-count">{task.quantity} 篇内容</span>
           </div>
           <div className="panel-body">
-            {panelMetric(task.claimed_quantity, task.quantity, "已领取", "publish")}
+            {panelMetric(task.dist_total ?? 0, task.quantity, "已领取", "publish")}
             {panelChat(task, "任务群")}
           </div>
           <div className="panel-foot">
@@ -4416,11 +4420,11 @@ function TaskRowCard({
               <span className="panel-count">
                 {task.recovery_due_at && task.recovery_due_at !== task.due_at
                   ? `截止 ${formatDate(task.recovery_due_at)}`
-                  : `${task.claimed_quantity} 份截图`}
+                  : `${task.dist_total ?? 0} 份截图`}
               </span>
             </div>
             <div className="panel-body">
-              {panelMetric(task.dist_submitted ?? 0, task.claimed_quantity, "已收取", "recovery")}
+              {panelMetric(task.dist_submitted ?? 0, task.dist_total ?? 0, "已收取", "recovery")}
             </div>
             <div className="panel-foot">
               <button type="button" className="panel-detail" onClick={() => onDetail(task)}>
diff --git a/lib/collection-service.ts b/lib/collection-service.ts
index 6586e5d..640004a 100644
--- a/lib/collection-service.ts
+++ b/lib/collection-service.ts
@@ -355,14 +355,25 @@ export async function collectDistributionMetrics(
         .bind(message, run.id),
       db
         .prepare(
+          // 已有历史数据（此前采集成功过）的分行失败时不降级为 failed：
+          // 保留 success 状态与数据时间，仅在描述里说明本次刷新失败。
           `UPDATE distributions
-           SET collection_status = 'failed',
-               collection_status_description = ?,
-               collection_updated_at = CURRENT_TIMESTAMP,
+           SET collection_status = CASE
+             WHEN latest_likes IS NULL THEN 'failed'
+             ELSE 'success'
+           END,
+               collection_status_description = CASE
+             WHEN latest_likes IS NULL THEN ?
+             ELSE ?
+           END,
+               collection_updated_at = CASE
+             WHEN latest_likes IS NULL THEN CURRENT_TIMESTAMP
+             ELSE collection_updated_at
+           END,
                updated_at = CURRENT_TIMESTAMP
            WHERE id = ?`,
         )
-        .bind(message, distributionId),
+        .bind(message, `${message}，沿用上次采集数据`, distributionId),
     ]);
     throw error;
   }
diff --git a/lib/mvp-db.ts b/lib/mvp-db.ts
index 35fdf06..823ea0f 100644
--- a/lib/mvp-db.ts
+++ b/lib/mvp-db.ts
@@ -853,6 +853,18 @@ export async function seedIfEmpty() {
     );
   }
 
+  // 任务卡与详情的「已领取」以 claimed_quantity 为口径，领取/释放路径会
+  // 增减它；种子阶段的手写数字与实际分发行数容易漂移，最后统一对账。
+  batch.push(
+    db
+      .prepare(
+        `UPDATE tasks
+         SET claimed_quantity = (
+           SELECT COUNT(*) FROM distributions d WHERE d.task_id = tasks.id
+         )`,
+      ),
+  );
+
   await db.batch(batch);
 }
 
diff --git a/lib/project-service.ts b/lib/project-service.ts
index 9ea4c86..8846056 100644
--- a/lib/project-service.ts
+++ b/lib/project-service.ts
@@ -51,6 +51,7 @@ export type ProjectTaskRow = {
   task_chat_id: string;
   recovery_enabled: number;
   recovery_due_at: string;
+  dist_total: number;
   recovery_submitted: number;
 };
 
@@ -287,6 +288,7 @@ export async function getProjectDetail(
       `SELECT id, name, brand, quantity, claimed_quantity, due_at, status,
               task_type, platform, content_format, share_token, owner_userid, task_chat_id,
               recovery_enabled, recovery_due_at,
+              (SELECT COUNT(*) FROM distributions d WHERE d.task_id = t.id) AS dist_total,
               (SELECT COUNT(*) FROM distributions d WHERE d.task_id = t.id AND d.result_submitted_at IS NOT NULL) AS recovery_submitted
        FROM tasks t WHERE t.project_id = ?
        ORDER BY t.created_at DESC`,
diff --git a/mysql/0021_reconcile_claimed_quantity.sql b/mysql/0021_reconcile_claimed_quantity.sql
new file mode 100644
index 0000000..3d25f2c
--- /dev/null
+++ b/mysql/0021_reconcile_claimed_quantity.sql
@@ -0,0 +1,13 @@
+-- 校准任务领取计数：0020 物理合并删除了伴生回收任务的分发/领取行、并搬运了
+-- 部分回收到父任务分发行，但没有同步父任务 claimed_quantity，任务卡「已领取」
+-- 会与实际分发行数漂移。领取(+1)/释放(-1) 路径共同维护的不变式是：
+-- content_publish 任务的 claimed_quantity = 当前分发行数，此处按此对账。
+UPDATE tasks
+SET claimed_quantity = (
+  SELECT COUNT(*) FROM distributions d
+  WHERE d.task_id = tasks.id
+)
+WHERE claimed_quantity <> (
+  SELECT COUNT(*) FROM distributions d
+  WHERE d.task_id = tasks.id
+);
diff --git a/tests/claimed-quantity.test.mjs b/tests/claimed-quantity.test.mjs
new file mode 100644
index 0000000..56329ff
--- /dev/null
+++ b/tests/claimed-quantity.test.mjs
@@ -0,0 +1,53 @@
+import assert from "node:assert/strict";
+import { readFile } from "node:fs/promises";
+import test from "node:test";
+
+// claimed_quantity 口径：领取(+1)/释放(-1) 维护的不变式是
+// claimed_quantity == 当前分发行数。种子与 0020 迁移都可能造成漂移，
+// 这里钉住三道防线：种子末尾对账、0021 生产对账、UI 一律读实时 dist_total。
+
+test("seed reconciles claimed_quantity with actual distribution rows", async () => {
+  const source = await readFile(
+    new URL("../lib/mvp-db.ts", import.meta.url),
+    "utf8",
+  );
+  const reconcile = source.indexOf(
+    "SET claimed_quantity = (\n           SELECT COUNT(*) FROM distributions d WHERE d.task_id = tasks.id",
+  );
+  assert.ok(reconcile > 0, "种子阶段缺少 claimed_quantity 对账 UPDATE");
+  const lastDistributionInsert = source.lastIndexOf(
+    "INSERT INTO distributions",
+  );
+  assert.ok(
+    reconcile > lastDistributionInsert,
+    "对账必须发生在所有分发 INSERT 之后",
+  );
+  const batchEnd = source.indexOf("await db.batch(batch);", reconcile);
+  assert.ok(batchEnd > reconcile, "对账语句必须在 seedIfEmpty 的 batch 内执行");
+});
+
+test("migration 0021 recalculates drifted claimed_quantity in production", async () => {
+  const migration = await readFile(
+    new URL("../mysql/0021_reconcile_claimed_quantity.sql", import.meta.url),
+    "utf8",
+  );
+  assert.match(migration, /UPDATE tasks\s+SET claimed_quantity = \(\s+SELECT COUNT\(\*\) FROM distributions d\s+WHERE d\.task_id = tasks\.id\s+\)/);
+  assert.match(migration, /WHERE claimed_quantity <> \(/);
+});
+
+test("admin surfaces read the live distribution count, not the counter", async () => {
+  const [adminApp, projectService] = await Promise.all([
+    readFile(new URL("../app/admin-app.tsx", import.meta.url), "utf8"),
+    readFile(new URL("../lib/project-service.ts", import.meta.url), "utf8"),
+  ]);
+
+  // 任务卡双面板 + 概览统计
+  assert.match(adminApp, /panelMetric\(task\.dist_total \?\? 0, task\.quantity, "已领取"/);
+  assert.match(adminApp, /panelMetric\(task\.dist_submitted \?\? 0, task\.dist_total \?\? 0, "已收取"/);
+  assert.match(adminApp, /sum \+ \(task\.dist_total \?\? 0\)/);
+  // 项目树明细同样用实时口径
+  assert.match(projectService, /AS dist_total/);
+  assert.match(adminApp, /\{task\.dist_total\} \/ \{task\.quantity\}/);
+  // 展示层不再读反规范化计数器
+  assert.doesNotMatch(adminApp, /task\.claimed_quantity/);
+});
diff --git a/tests/collection-schedule.test.mjs b/tests/collection-schedule.test.mjs
index d24ef01..5d25a50 100644
--- a/tests/collection-schedule.test.mjs
+++ b/tests/collection-schedule.test.mjs
@@ -1,4 +1,5 @@
 import assert from "node:assert/strict";
+import { readFile } from "node:fs/promises";
 import test from "node:test";
 import { isCollectionScheduleDue } from "../lib/collection-service.ts";
 import { sortWithNullsLast } from "../lib/sort-utils.ts";
@@ -56,3 +57,24 @@ test("sorts both directions while keeping missing values last", () => {
     ["high", "middle", "low", "missing-a", "missing-b"],
   );
 });
+
+test("a failed collection keeps historically successful rows on success", async () => {
+  const source = await readFile(
+    new URL("../lib/collection-service.ts", import.meta.url),
+    "utf8",
+  );
+
+  // 失败写入必须按 latest_likes 分流：无数据 → failed；
+  // 已有历史数据 → 保持 success，仅描述里说明沿用上次数据。
+  assert.match(
+    source,
+    /collection_status = CASE\s+WHEN latest_likes IS NULL THEN 'failed'\s+ELSE 'success'\s+END/,
+  );
+  assert.match(
+    source,
+    /ELSE \?\s+END,\s+collection_updated_at = CASE\s+WHEN latest_likes IS NULL THEN CURRENT_TIMESTAMP\s+ELSE collection_updated_at/,
+  );
+  assert.match(source, /`\$\{message\}，沿用上次采集数据`/);
+  // run 行照实记录失败，保留可观测性
+  assert.match(source, /UPDATE collection_runs\s+SET status = 'failed'/);
+});