diff --git a/src/App.vue b/src/App.vue
index 362142b7..771da690 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1311,6 +1311,7 @@ const fetchDownloadCount = async (app: App): Promise<number> => {
   try {
     const resp = await fetch(
       `${APM_STORE_BASE_URL}/${finalArch}/${app.category}/${app.pkgname}/download-times.txt`,
+      { signal: rootAbortController.signal },
     );
     if (!resp.ok) return 0;
     const text = (await resp.text()).trim();
diff --git a/src/modules/ranking.ts b/src/modules/ranking.ts
index aa71db47..197bee53 100644
--- a/src/modules/ranking.ts
+++ b/src/modules/ranking.ts
@@ -70,9 +70,16 @@ export function topByUpdate(
   origin: AppOrigin,
   topN: number = TOP_N,
 ): App[] {
+  // 按 update 字段倒序；后端日期格式可能不严格一致（如 2026-08-10 / 2026/08/10 /
+  // 带时分秒），用时间戳数字比较比 localeCompare 字符串比较更鲁棒。
+  // 无效日期 getTime() 为 NaN，统一按 0 处理，避免 NaN 参与比较导致乱序。
+  const toTime = (s: string | undefined): number => {
+    const t = new Date(s || "").getTime();
+    return Number.isFinite(t) ? t : 0;
+  };
   return apps
     .filter((a) => a.origin === origin && a.update)
-    .sort((a, b) => (b.update || "").localeCompare(a.update || ""))
+    .sort((a, b) => toTime(b.update) - toTime(a.update))
     .slice(0, topN);
 }