How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Sunday100.0*Average seed
Bel 4 Bra 3 (ot)-0.1
Cov 4 Not 3 +0.1
Dun 3 Fif 4 (so)-0.0
Saturday100.0*Average seed
Bel 5 Not 3 +0.2
She 2 Cov 0 +0.1
Dun 3 Edi 1 -0.0
Bra 4 Fif 5 (so)-0.0
If winner is:HomeHome OTHome SOAway SOAway OTAway
Sunday100.0*Average seed
Fif vs Bra-0.5-0.5-0.5+0.5+0.5+0.5

What If

Chances based on how well the Bra finish out the regular season.   Explain

100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPWL-OTplayoffs12345678910Count
5810-0In10020,049,725
56-57In10020,049,775*
Total:In505040,099,500

* Row combines multiple less frequent records.

Points
Chance Will Make Playoffs