diff --git a/lib/shared/sidebar-item-utils.js b/lib/shared/sidebar-item-utils.js
--- a/lib/shared/sidebar-item-utils.js
+++ b/lib/shared/sidebar-item-utils.js
@@ -167,10 +167,16 @@
     topUnreadPromise,
   ]);
 
-  const topResults = [
-    ...topGeneralResults.slice(0, maxReadSidebars),
-    ...topUnreadResults.slice(0, maxUnreadSidebars),
-  ];
+  const topResults = topUnreadResults.slice(0, maxUnreadSidebars);
+  const topThreadIDs = new Set([
+    ...topResults.map(result => result.threadInfo.id),
+  ]);
+  const generalResults = topGeneralResults.slice(0, maxReadSidebars);
+  for (const result of generalResults) {
+    if (!topThreadIDs.has(result.threadInfo.id)) {
+      topResults.push(result);
+    }
+  }
 
   return topResults.map(result => {
     const {