Hi bryson, “Combine duplicates (same In & Out values.) was already check. I’ve made a test, take 10 videos in a new catalog, and re-import them over and over again, and it keep making lines video lines. But I won’t SHOUT 🙂 I use Tool/Find similar, on all open catalog based on name… my clip appears in an new windows. I select some and try to delete them in this windows… not working. I’ve check and i’m the Clip Owner, and anyway, i’m the Administrator so I can delete them anyway. I’ll keep looking.