diff --git a/app.py b/app.py
index 3e87d01..e38ed3e 100644
--- a/app.py
+++ b/app.py
@@ -452,15 +452,23 @@ def api_posts():
             if user_communities:
                 post_source = post_data.get('source', '').lower()
                 post_platform = post_data.get('platform', '').lower()
+                post_id = post_data.get('id', '').lower()
 
                 # Check if this post matches any of the user's selected communities
                 matches_community = False
                 for selected_community in user_communities:
                     selected_community = selected_community.lower()
-                    # Match by exact source name or platform name
+
+                    # Enhanced matching logic:
+                    # 1. Exact source match
+                    # 2. Platform match (for generic selections like 'hackernews')
+                    # 3. Partial match in post ID for platform-specific communities
+                    # 4. Handle current data mismatch where HN posts have source="hackernews"
                     if (post_source == selected_community or
                         post_platform == selected_community or
-                        selected_community in post_source):
+                        (selected_community in post_source) or
+                        (selected_community in post_id) or
+                        (post_platform == 'hackernews' and selected_community in ['front_page', 'ask', 'show', 'hackernews'])):
                         matches_community = True
                         break