Not sure what I'm doing but I try to move some audio track onto the same track and can't seem to do it. I may have narration on one track and music goes to another track and I cannot seem to move it up to the same track or keep all audio on one or two tracks.
Likely you're trying to put a mono audio signal into a stereo track. Premiere does not allow this. File and track properties (mono, stereo, 5.1) must match.
Also, look closely at the Track Header. If it has one "speaker" icon, it's mono - two, and it's stereo.
If you wish to move the Tracks around a bit, you can both Insert Tracks (make sure that it matches your source files), an also Delete unused Tracks.