Tournament sections will NEVER have more than 8 players, so if 12 players sign up, it will be broken into 2 sections of 6, meaning you will play 5 games. You will not be able to play one tourney of each game at once because of your 50 games at a time limit. That restriction only really applies if you want to enter another chess tournament, for example, if you're already playing in one.

If you don't like that restriction, upgrade to rook :-)