How are these numbers calculated?

Big Games

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

Week of 2/14None
Week of 2/21100.0*Average seed
McKendree 5 Waldorf 1 +0.0
McKendree 8 Waldorf 4 +0.0
Week of 2/28100.0*Average seed
Waldorf 0 Midland 5 +0.4
Northern Illinois 4 Maryville 3 (so)+0.4
Waldorf 5 Midland 3 -0.2
Northern Illinois 5 Maryville 8 -0.1
Points
Chance Will Win Championship