How are these numbers calculated?

Big Games

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

Week of 8/2100.0*Chance in playoffs100.0*League100.0*Average seed
West Auckland 2 Canterbury 5 +6.2
+12.3
+0.2
Dunedin 6 Botany 5 +3.6
-10.4
-0.1
West Auckland 5 Canterbury 7 +1.6
+12.4
+0.1
Dunedin 5 Botany 4 +0.6
-12.4
-0.1
Week of 8/9100.0*Chance in playoffs100.0*League100.0*Average seed
Botany 7 Southern 6 (ot)In
Canterbury 6 Dunedin 1 In
+28.6
+0.3
Canterbury 6 Dunedin 0 +23.9
+0.2
Week of 8/16100.0*Chance in playoffs100.0*League100.0*Average seed
West Auckland 7 Dunedin 8 -7.4
-0.1
Southern 4 Canterbury 5 Yes
+0.0
Points
Chance Will Make Playoffs