Its possible one or both of them aren't being entirely truthful about any restrictions or other handicaps their vig roles might have even if they are both town.This is kind of random spec, but if we did have two vigs, we probably would have a bigger mafia and not a serial? (This would sort itself out anyway via night kills)
Imagine 4 kills in a night
But almost every SINGLE ranked game here has had a third party/indy presence in some capacity.