Everything looks legit. Of the 5 teams that finished 8-5:
Gulys Guam Bomb went 4-0 against the other 4 teams
DonkOneMore & Huckleberry's seed went 2-2 against the other 4 teams
FIVEandSIX & Double Entendres went 1-3 against the other 4 teams
Here is my fancy Excel breakdown (Color coding is for divisions in case that came into play):
So the playoffs are set:
1) Beast from the West vs. 4) DonkOneMore
2) Gulys Guam Bomb vs. 3) Huckleberry's Seed