Hello, Mabons is correct. The way it works allow equal distribution of factions but it may feel totally random to players when there are many games opening in short amount of time. I would prefer if faction selected happened by players before the game but as far as I know there is no final decision regarding that yet. However after discussing with a couple of coworkers, we decided to make it so every game mode has its own faction pot until a better way is fully decided and implemented. This should allow Siege game mode to have more visible variety of factions.