Incorrect...Southern Utah must WIN at North Dakota, while Sac and NAU both lose in Montana and EWU wins at Weber. In that case, EWU, Nau and Sac are in a three-way tie for 7th at 8-12 and are all 2-2 in head-to-head play (EWU swept NAU, who swept Sac, who swept EWU). So it goes to the next tiebreaker, which is record vs. the league in descending order. All three were swept by Montana, but EWU beat Weber, thus they win the tiebreaker.
If Southern Utah LOSES to North Dakota and the other three lose/win in the above scenario, then there is a 4-way tie for 6th at 8-12. Southern Utah was 4-2 head-to-head, Sac and EWU 3-3 and NAU 2-4. So Southern Utah gets 6th and the tiebreak is between Sac and EWU for 7th and Sac wins it with the head-to-head sweep of EWU.
That is from the conference office, so it's official. I didn't explain it this way on the broadcast because I thought EWU could only tie for 7th and didn't see the possibility of the 4-way tie for 6th. After the game last night, I looked at the standings and thought the tie for 6th hadn't been covered, but it had. My mistake. Should have figured it out ahead of time...