Why do music files amassed in Windows Media Player double up? While library is released there is two of each song. Is there a setting to immobilize this duel impasse? Each music file is stored two times in Windows Media Player library If I remove one of the twice Mp3 files the subsequent time I unlock Windows Media Player music library the song is totally disappeared. Why this is happening? Anyone else have the similar issue? Or anyone knows the solution for this? Any information or help will be appreciated.