How are these numbers calculated?

Big Games

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

Week of 9/20100.0*Chance in playoffs100.0*Average seed
Madison 1 North Texas 0 -3.1
-0.1
Lansing 1 South Georgia 1 -1.5
+0.0
Tucson 0 Richmond 0 +1.1
+0.1
Chattanooga 2 Orlando B 1 -1.0
-0.1
Greenville 3 Toronto II 1 -0.7
+0.1
Tucson 2 Greenville 3 +0.2
+0.2
Week of 9/27100.0*Chance in playoffs100.0*Average seed
Toronto II 1 South Georgia 0 Out
-0.5
Tucson 1 Madison 1 Out
+0.1
Richmond 1 Toronto II 2 -0.2
Chattanooga 2 Richmond 1 +0.1
Week of 10/4100.0*Chance in playoffs100.0*Average seed
South Georgia 3 Greenville 1 +0.5
Tucson 1 North Texas 3 +0.3
Chattanooga 1 Toronto II 1 +0.1
Points
Chance Will Make Playoffs