There is a tutorial regading this. Check below.
http://kb.sandisk.com/app/answers/detail/a_id/2531/~/songs-show-up-twice-on-the-sansa-player
There is a tutorial regading this. Check below.
http://kb.sandisk.com/app/answers/detail/a_id/2531/~/songs-show-up-twice-on-the-sansa-player