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*First-round bye100.0*Average seed
Los Angeles 1 Antigua 2 -9.8
No
-0.4
Richmond 2 Antigua 0 -4.7
-0.1
Harrisburg 3 Charleston 0 -3.1
-0.1
Charlotte 4 Antigua 0 -2.6
-0.1
Wilmington 2 Charleston 1 -2.4
-0.1
Charleston 2 Wilmington 2 +0.4
+0.0
Week of 8/10100.0*Chance in playoffs100.0*First-round bye100.0*Average seed
Los Angeles 1 Antigua 0 +6.7
+0.1
Pittsburgh 0 Charlotte 3 -1.4
-0.1
Rochester 0 Charleston 4 -0.5
Richmond 2 Harrisburg 1 +0.4
Dayton 2 Charlotte 2 +0.2
Week of 8/19None
Points
Chance Will Make Playoffs