Yes, I know, it's a theoretical situation. Just tossing it out there as a possibility. Maybe not a likely possibility, but a possibility nonetheless.
EDIT: oh, about the tempo map - make sure that the BPM envelope is visible in your Master Track. I'm pretty sure you could select the first tempo change, shift-click on the last change, and move all of them together. If not, then you're gonna have to move them individually, but as long as the BPM changes are correct you should only have to shift them to the downbeat of the measure before!