How are these numbers calculated?

Big Games

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

Week of 9/9100.0*Chance in playoffs100.0*Average seed
Salt Lake City 0 Orange County 2 -18.2
-1.0
Salt Lake City 2 San Antonio 0 +15.1
+1.4
Swope Park 3 Tulsa 0 -2.2
-0.1
San Antonio 1 St Louis 3 +2.1
-0.0
OKC 2 Seattle 2 +0.9
+0.1
Los Angeles 1 RGV 0 -0.6
Arizona 1 Portland 2 -0.4
-0.1
Los Angeles 1 Sacramento 1 -0.4
RGV 0 Portland 1 -0.2
-0.1
Week of 9/17100.0*Chance in playoffs100.0*Average seed
Arizona 3 Salt Lake City 2 -17.1
-1.0
Orange County 0 RGV 1 +8.7
+0.2
Vancouver 0 Portland 2 -3.5
-0.3
San Antonio 2 Tulsa 0 -3.3
-0.2
Col Springs 2 Seattle 1 +2.3
+0.2
OKC 0 Swope Park 3 -1.0
St Louis 1 Louisville 5 +0.1
Week of 9/24100.0*Chance in playoffs100.0*Average seed
Orange County 4 Col Springs 0 Out
-0.2
Portland 3 Arizona 2 Out
Los Angeles 3 Salt Lake City 1 Out
-1.0
RGV 3 San Antonio 0 +5.6
+0.1
Swope Park 2 Seattle 0 +0.2
Points
Chance Will Make Playoffs