[sleadley]

We have seen a problem recently where there was a case exactly as you describe where there were missing bars. The solution If I remember was to delete the last tempo change before the screwy bars and re-insert the correct tempo. But, to be honest, we were in a rush for a session as well, so I don't know exactly how we did it. If you like sen me the session without audio and I will take a look at it.
best regards
Simon L.