Kinda sounds like you were selecting from the Inspector which possibly had a different Track or Buss selected at the time listing its outputs?
I have done it in the past, think I have a track Im working on up on the Inspector-be looking at a track in track view and it would be the buss on the Inspector cause it was the last thing I actually touched bringing it up/keeping it on the inspector.
Make sense?
Where exactly were you making the selection from , Inspector on the left of Track View, Track View, Console View, etc...