After reaching out multiple times, here is the answer I got from an INFC Official:
"Seedings for the PST are determined by only two factors: Division wins and Total Points, both from the Divisional Standings page. Each Division Win counts for 2 points and then Total points are added or subtracted to give a final point total, which will be used to seed teams in order greatest to least."
Here's the kicker, they seeded all teams after Week 8, they didn't even factor in the final games of the regular season...Can you imagine if they seeded and set the Playoff brackets before the season was over! He said they do it that way for time constraints, but like I and CoachSMc said, it takes all of 10 minutes to seed and I was using more than only 2 factors. I know there are Grade Directors for each individual grade, surely they could have taken an extra 10 minutes to accurately seed each team based on an entire season, but if not, let me know and I'll volunteer to do it next season. Or, just do a blind draw, at least then everyone knows that it's random going in.
Anyway, all that being said, our boys will show up and play whatever team they decide we should play. Our team is just excited to extend their season and play more football. After all, it's about the kids on the field!
Good luck to all Players and Coaches in the Playoffs and Post-Season Tournaments!