If I were you I would create a new folder , say query. Then move the possible duplicate folders to the query folder. Then do a search for one of your music files and see if it is in the "correct" Music folder. It sounds as if the others are duplicates. Then I would drag the query folder to the recycle bin. Then try to play one of the music tracks from the proper location. I would not empty the recycle bin until you are sure all is well.