How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 4/11100.0*Chance in playoffs100.0*Playoffs100.0*Average seed
Pirae 4 Auckland City 11 -22.8
-22.8
-1.9
If winner is:HomeDrawAway
Hekari United vs Team Wellington-1.7+2.7+1.7
-1.7+2.7+1.7
-0.1+0.1+0.0
Tafea vs Team Wellington-1.7+2.7+1.7
-1.7+2.7+1.7
-0.1+0.1+0.0
Ba vs Gaïtcha-0.9+1.8+2.8
-0.9+1.8+2.8
-0.1+0.0+0.3
Tafea vs Hekari United-0.6+2.7-0.6
-0.6+2.7-0.6
-0.0+0.1-0.0
Western United vs Amicale-1.4+1.5+2.0
-1.4+1.5+2.0
+0.0+0.1-0.1
Tefana vs Hekari United+0.5+0.4-1.3
+0.5+0.4-1.3
+0.0-0.0-0.1
Tefana vs Tafea+0.4+0.4-1.3
+0.4+0.4-1.3
+0.0-0.0-0.1
Auckland City vs Western United-0.5-0.7+0.8
-0.5-0.7+0.8
If winner is:HomeDrawAway
Week of 4/18100.0*Chance in playoffs100.0*Playoffs100.0*Average seed
Ba vs Pirae-35.6-12.0+55.0
-35.6-12.0+55.0
-1.5+0.2+1.9
Amicale vs Auckland City+3.0+1.7-2.2
+3.0+1.7-2.2
-0.0+0.1-0.0

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsPlayoffs123456789101112Count
61-0-090.8%90.8%1124434906,064,978
40-1-023.823.803214726403,332,081
30-0-10.20.2004344516108,260,757
Total:35.8%35.8%04161614212271017,657,816
Points
Chance Will Make Playoffs