How are these numbers calculated?

Big Games

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

Week of 9/5100.0*Chance in playoffs100.0*Average seed
Pittsburgh 1 Charleston 1 +4.0
+0.1
New York 3 Louisville 2 -0.7
-0.2
Richmond 0 Rochester 0 +0.6
+0.0
Charlotte 4 Toronto 1 -0.1
Charlotte 2 Wilmington 2 +0.0
Montreal 2 New York 0 +0.2
Week of 9/12100.0*Chance in playoffs100.0*Average seed
Charleston 2 Louisville 0 +4.7
+0.6
Wilmington 1 Pittsburgh 1 +1.4
+0.1
Harrisburg 1 Richmond 1 +1.3
+0.1
St Louis 2 Charlotte 0 +0.3
+0.1
Week of 9/19100.0*Chance in playoffs100.0*Average seed
Charleston 3 Charlotte 1 +0.6
Rochester 3 New York 2 +0.2
Points
Chance Will Make Playoffs