I'm just playing devil's advocate so I don't know for sure. But how do you know they all set theirs to advance? When they do this it uploads a file right? Maybe during upload it didn't synch? Do you as commish see something that says Team A has update, waiting on team B, c and D?
I'm just saying that the cause is probably not the game sending incorrect stats but more likely that it is not registering those users as having done their stuff and thus simulating it. That doesn't explain why the game is not seeing those people as complete, I was just throwing out some theories.