So they can leave your team as soon as the tourney starts and go back to their old team to be able to paricipate in f/s challenge matches but their games for your team still continue? I thought that once you were in a game for a f/s you had to stay until the tournament/challenge ended?

If that is the case I will let my team know about it so that any that miss out can participate with another team in the team tourney but still come back to us if they wish to play with us in our f/s challenges.

I do understand your point about multiple teams though. When you think about it it might mean your own f/s playing your own f/s in the last section. And keeping it to one team allows more f/s a chance to participate.