How are these numbers calculated?

Big Games

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

Week of 8/11100.0*Chowder Cup100.0*Average seed
Meatballs 3 Saints 6 -21.0
-0.3
Shocker 4 YYZ 7 -2.3
-0.1
Week of 8/18100.0*Chowder Cup100.0*Average seed
Meatballs 1 Shocker 0 Yes
+0.5
Saints 1 TonyMontana 5 +18.0
+0.3
YYZ 3 GhilaniElectric 9 +9.1
+0.2
Week of 8/25None
Points
Chance Will Make Playoffs