Music being skipped on ipod

Recently purchased a new digital album, the songs work fine on itunes (well, music, the app that replaced it) but won't work on ipod. It just skips past most of them. I've reset the device itself and put them back on but that didn't help. The files are lossless .wav ones.

I realised this is the kind of thing that could be sorted via e-mailing support, but they have no option for that so my only option was either a phone call, taking the device into a shop (still confused by that one), or this.