How are these numbers calculated?

Big Games

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

Week of 8/3100.0*Chance in playoffs100.0*Average seed
Orlando 0 Pittsburgh 1 +17.7
+1.0
Rochester 1 Pittsburgh 0 -7.1
-0.8
Tampa Bay 0 Orlando 3 +2.3
+0.1
Dayton 0 Wilmington 1 +1.4
+0.2
Los Angeles 2 Charleston 1 -1.1
-0.1
Wilmington 2 Dayton 1 +0.9
+0.1
Los Angeles 2 Harrisburg 2 -0.3
+0.0
Charleston 5 Richmond 2 -0.1
Week of 8/10100.0*Chance in playoffs100.0*Average seed
Pittsburgh 3 Tampa Bay 2 In
+0.5
Harrisburg 3 Tampa Bay 1 +2.5
+0.0
Richmond 5 Dayton 2 +2.0
+0.1
Charlotte 5 Antigua 0 -0.0
Wilmington 4 Pittsburgh 1 -0.5
Phoenix 0 Charleston 1 -0.0
Week of 8/17100.0*Chance in playoffs100.0*Average seed
Dayton 3 Harrisburg 1 -0.3
Pittsburgh 1 Richmond 1 +0.2
Los Angeles 2 Rochester 1 -0.2
Points
Chance Will Make Playoffs