I figured I'd stick some of my own music into the game for the hell of it, so I converted the tracks I need into ogg files. They all play perfectly outside the game. In the game however, all of them work except for GMTACTIC2 - GMTACTIC4 and GMINTER2 - GMINTER4. Any time I enter battlescape, only GMTACTIC plays, same for the interception music.
Now I'm not sure what the issue is but it should be working, the music plays properly (and to double check I even re-labelled the tracks to check if the files were fine) and they're given the correct names according to the wiki. Anyone know what the deal is?