How are these numbers calculated?

Big Games

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

Week of 7/1100.0*Chance in playoffs100.0*Average seed
Portland-U23 1 Crossfire 0 In
+0.4
Vancouver-U23 4 North Sound 0 -0.2
Crossfire 0 Sounders-U23 1 +0.1
-0.1
Kitsap 2 North Sound 1 -0.1
-0.1
Kitsap 1 Sounders-U23 2 -0.0
Week of 7/8100.0*Chance in playoffs100.0*Average seed
Portland-U23 0 Kitsap 1 -0.9
Orange County 6 Tuscan 0 +0.8
Tuscan 0 Ogden 0 +0.2
Sounders-U23 1 Fraser Valley 0 -0.1
Week of 7/15None
Points
Chance Will Make Playoffs