No wonder you were having problems. Changing the tempo in the transport at the bottom of the window does NOT put in a tempo change. It just changes the whole tempo globally. If you are changing it in the global tracks you should be fine.Before talking with Apple on this subject I had made my changes in the little tempo window at the bottom of the screen...that's what changed the whole track. Now I am making the change in the Global Track window. I increased the tempo from 120 to 150 @ my split point but still I have the same tempo in all tracks from the speakers, except now in the tempo window at the bottom, the change shows the increase.