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 -0.1
-0.1
If winner is:HomeDrawAway
Ba vs Gaïtcha+24.9-3.1-23.4
+24.9-3.1-23.4
+2.2+0.2-2.3
Tafea vs Team Wellington-0.7+1.5*+0.0
-0.7+1.5*+0.0
Hekari United vs Team Wellington-0.7+1.5*+0.0
-0.7+1.5*+0.0
Tefana vs Hekari United-0.4+0.7+0.1
-0.4+0.7+0.1
Tefana vs Tafea-0.4+0.7+0.1
-0.4+0.7+0.1
Tafea vs Hekari United-0.2+0.9-0.2
-0.2+0.9-0.2
Western United vs Amicale-0.4+0.4+0.2
-0.4+0.4+0.2
+0.1-0.0-0.1
Auckland City vs Western United-0.2+0.5*+0.0
-0.2+0.5*+0.0
+0.0-0.1+0.0
If winner is:HomeDrawAway
Week of 4/18100.0*Chance in playoffs100.0*Playoffs100.0*Average seed
Ba vs Pirae+27.1-4.1-25.2
+27.1-4.1-25.2
+2.4-0.2-2.3
Amicale vs Auckland City+0.3+0.7-0.6
+0.3+0.7-0.6
-0.1-0.0+0.1

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsPlayoffs123456789101112Count
62-0-099.0%99.0%1037439101,004,047
41-1-053.453.40124140610934,619
31-0-12.42.40215302916712,005,785
20-2-0OutNo03255022218,289
10-1-1OutNo06274225934,713
00-0-2OutNo220791,002,883
Total:25.3%25.3%269911111111953136,100,336
Points
Chance Will Make Playoffs