Yea, it's just how Fencer has it programed - to make it easy, it just looks for 5 free game slots for "1 game per 2 players", and 10 free game slots for "2 games per 2 players" .... even if more or less game slots are needed.

(So a pawn may have 10 free game slots, start a tournament and add 14 games bringing the total to 24 games, which they would then need to get the total back down below 20 before starting any new after that.)