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
Los Angeles 2 Charleston 1 +21.2
+0.8
Tampa Bay 0 Orlando 3 +6.9
+0.1
Orlando 0 Pittsburgh 1 -6.6
-0.2
Los Angeles 2 Harrisburg 2 -2.7
-0.2
Rochester 1 Pittsburgh 0 +2.4
+0.2
Dayton 0 Wilmington 1 +1.9
+0.1
Wilmington 2 Dayton 1 +1.6
+0.2
Charleston 5 Richmond 2 -0.5
-0.1
Week of 8/10100.0*Chance in playoffs100.0*Average seed
Harrisburg 3 Tampa Bay 1 +2.6
+0.1
Richmond 5 Dayton 2 +1.5
+0.2
Pittsburgh 3 Tampa Bay 2 In
-0.2
Charlotte 5 Antigua 0 -0.4
-0.2
Wilmington 4 Pittsburgh 1 +0.3
Phoenix 0 Charleston 1 -0.1
Tampa Bay 3 Charlotte 3 -0.1
Week of 8/17100.0*Chance in playoffs100.0*Average seed
Los Angeles 2 Rochester 1 +0.5
Dayton 3 Harrisburg 1 -0.2
Pittsburgh 1 Richmond 1 -0.1
Points
Chance Will Make Playoffs