I find that when I have two powerpoints open, and each on a separate space, then whenever I change to a space that has a powerpoint open (from a space without any ppt), the system instantly switches to the other powerpoint (the one I didn't want to go to).
The problem is, OSX does this even without TotalSpaces running. If I select a space in Mission control, or swipe to get to one that has a ppt on it, the system instantly switches to the other one.
I think what's happening is that each powerpoint window is being activated in turn, and each activation causes a space switch.
These switches come from the system. Given that I can't usually ignore system requested space changes (eg from clicking an app on the dock, or cmd-tab), it makes it hard to determine when to ignore and when not to.
Do you confirm the same behaviour as I see (even without TS running)?