How are these numbers calculated?

Big Games

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

Week of 4/13100.0*Average seed
Holmer Green 0 Hertford Town 5 -0.1
Holmer Green 2 Haringey Boro 7 -0.1
Oxhey Jets 10 Hatfield Town 1 +0.0
Week of 4/20100.0*Average seed
Hillingdon Boro 0 Holmer Green 1 +0.1
Colney Heath 4 Hatfield Town 1 +0.0
Week of 4/27100.0*Average seed
Holmer Green 0 AFC Dunstable 3 -0.2
Points
Chance Will Make Playoffs