Synced my iPod last night and some of the purchased songs finish half way through.
How do I fix it STW gurus?
Coupled with my mail setting mystery and that make your computer slow Yosemite thing I’m beginning to think apple are a bunch of ****.

Have a look at the track info. One of the tabs has a play from to section on it, check that this is allowing the whole song to play.
Edit on the Mac not the iPod.

You do realise that you can re-download the tracks that you own, if the issue still persists then contact iTunes, I find them very good to deal with.

The songs play all the way through on my laptop.