I had the same problem with my iTunes library. When I first started using iTunes I would sometimes get double track listings for some MP3s when I updated my library. Eventually the problem just seemed to go away, and hasn't happened now for a few months. I would just dump everything and build your library again, although I sort my MP3s both alphabetically by "Artist" and chronologically by "Date Added", so rebuilding my library is kind of inconvenient for me now-a-days.
― scottontharox (scottkundla), Monday, 16 February 2004 23:05 (twenty-one years ago)