How are these numbers calculated?

Big Games

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

Week of 8/23100.0*Chance in playoffs100.0*Average seed
Rochester 2 Harrisburg 2 -8.2
-0.5
Wilmington 3 Orlando 1 -7.2
-0.2
Orange County 1 Wilmington 2 -2.1
-0.0
Pittsburgh 3 Dallas 1 -1.9
-0.1
Seattle 5 Arizona 1 +1.8
+0.1
Charlotte 0 Pittsburgh 1 -1.0
-0.1
OKC 0 Charleston 2 +0.4
+0.0
Los Angeles 3 Wilmington 3 -0.4
-0.0
Sacramento 3 Charleston 1 +0.3
Week of 8/30100.0*Chance in playoffs100.0*Average seed
Harrisburg 1 Rochester 4 +42.5
+1.6
Charleston 4 Pittsburgh 0 +3.7
+0.1
Charleston 2 Harrisburg 1 +3.0
+0.1
Montréal 1 Charlotte 1 +2.5
+0.1
Wilmington 0 Sacramento 0 +1.4
+0.0
Sacramento 1 OKC 0 +0.4
+0.0
Orange County 1 Richmond 1 +0.0
Week of 9/6100.0*Chance in playoffs100.0*Average seed
Charlotte 2 Harrisburg 4 -10.2
-0.4
Pittsburgh 1 Arizona 2 In
+0.1
Rochester 2 Wilmington 0 +1.0
Points
Chance Will Make Playoffs