A lot of that is due to the guesswork that goes into ranking teams in six man football. The information that we have available in six man is very limited and at times, unreliable. And, even when we start getting useful information like scores, we have the 45 point mercy rule, which limits the ability I tell just how much better a team is than the other. There is a huge riddance between 45 at the half vs 45 with a minute or 2 in the 4th, but we don't get that info reliably enough to use it. So sometimes, what people call an upset is nothing more than a team being accurately rated yet due to a lack of information.