I've been wondering the same thing. My MP3s are in alphabetical order, so it means that I may be listening to another song by the same group.

I was wondering something else. RANDOM mode for regular CDs is either all songs on a disc or all songs on all discs. However, RANDOM mode for MP3s is either all songs in a folder on one disk or all songs on the entire disk. However, it will go to a different disks. What will the player do if you have some MP3 disks and some regular (WMA) disks?