So using audacity whenever I record in through my line and have my backing track playing, it records that along with what I'm playing.
Anyway to fix that?
Maybe you have a microphone attached to your computer and you've got "microphone" selected as where you record from instead of "line in", so it picks up what you're playing from your amp, as well as the backing track you here.
If that's not it, I don't know, but maybe try listening to the backing track on headphones while you record.
Ah but there lies the problem, I listen to the backing track on headphones, but it still records it!