Whenever I export audio in X2, the export progress bar starts, progresses, finishes... and then starts over! Multiple times! Honestly I had this problem back in X1 and Sonar 7 (I think?) but I ended up doing some "magic" that made it go away and I got a progress bar that "progressed" once and ended up with my stereo file. Now in X2 I seem to have lost my mojo. It almost seems like its bouncing down every track in the session before smushing them all together. I have tried various and sundry methods (different track selections, different bounce settings - tracks, mix, busses), 64 bit and not, fast bounce/slow bounce - no difference. Does this ring a bell with anyone?

It depends. I saw it happen when I was using 96khz sample rate. I thought it was preparing each track then mixing them down to one stereo track. I could be wrong though. It's been a while since I've used 96khz. I usually just use 44.1.

I've seen this mentioned in connection with many SONAR versions. I don't remember, what the cure was, but I'm sure someone pops in to help.

I've only ever seen this happen when either doing a multiple bounce, or freezing a multi output synth like BFD.

This is NOT the same as doing an export [File > Export] which only ever makes one pass (in my experience)