How are these numbers calculated?

Big Games

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

Week of 9/13100.0*Chance in playoffs100.0*Average seed
Thunder 4 Battery 0 -11.5
-0.2
Battery 1 RailHawks 2 -7.8
-0.3
Islanders 1 Silverbacks 1 +7.2
+0.3
RailHawks 1 Rhinos 1 +1.8
+0.1
Miami FC 1 Rhinos 0 -1.0
-0.2
Sounders 1 Silverbacks 1 +1.0
+0.1
Whitecaps 1 Impact 0 -0.4
Week of 9/20100.0*Chance in playoffs100.0*Average seed
Thunder 3 Impact 1 Out
-0.1
Miami FC 1 Silverbacks 0 Out
-1.1
RailHawks 1 Timbers 0 +0.1
Impact 0 Islanders 0 +0.1
Points
Chance Will Make Playoffs