^I think they just used it as their go-to "emotional scene" track. The music in the first game was odd at times. I'm convinced there's a bug in the scene where Benezia dies that keeps the "fight" music playing over her death music. I swear I can hear another track playing in the background.
For ME1, they hard mixed certain musical cues into some of the cutscenes, so when you played it with your own music, you'd get your music on top of the cutscene music, which didn't turn out well too often.