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
Charleston 5 Richmond 2 +0.4
+0.5
Orlando 0 Pittsburgh 1 -0.3
-0.1
Rochester 1 Pittsburgh 0 +0.1
Los Angeles 2 Charleston 1 -0.4
Week of 8/10100.0*Chance in playoffs100.0*Average seed
Harrisburg 3 Tampa Bay 1 In
-0.2
Richmond 5 Dayton 2 In
Phoenix 0 Charleston 1 In
+0.5
Charlotte 5 Antigua 0 -0.1
Charleston 3 Antigua 0 +0.2
Tampa Bay 3 Charlotte 3 +0.1
Week of 8/17100.0*Chance in playoffs100.0*Average seed
Dayton 3 Harrisburg 1 +0.6
Points
Chance Will Make Playoffs