Today I noticed that ONE of my playlists plays only the SAME twenty-something songs over and over again (there are 175!) NO MATTER WHAT I WANT TO PLAY. It will just go to the next song of that twenty, then the next, and so on. It does this no matter if I have Shuffle Play Songs on or not! What gives? Every other Playlist works fine. (For the record, I have reset the iPod (a 5G/60GB), as well as erased the Playlist in question AND re-loaded it, all to no avail). Ideas??