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
Hadley 0 Haringey Boro 2 +1.0
Holmer Green 2 Haringey Boro 7 +0.4
Leverstock Grn 0 Harefield Utd 2 -0.1
Hillingdon Boro 1 Colney Heath 5 -0.1
Stotfold 3 Colney Heath 1 +0.1
Berkhamsted 2 Hertford Town 2 +0.1
London Colney 4 Hadley 2 +0.1
Dunstable Town 1 AFC Dunstable 0 +0.0
Week of 4/20100.0*Average seed
Haringey Boro 1 Oxhey Jets 0 +0.8
Haringey Boro 3 Dunstable Town 3 +0.2
Hanwell Town 0 Harefield Utd 1 -0.2
Haringey Boro 0 AFC Dunstable 0 -0.2
Hertford Town 0 AFC Dunstable 1 -0.2
Colney Heath 2 Tring Athletic 3 +0.1
Berkhamsted 2 St.Margaretsbry 4 +0.1
AFC Dunstable 6 Leverstock Grn 2 -0.1
Leverstock Grn 4 Hadley 2 +0.1
Hadley 4 Stotfold 2 -0.1
Week of 4/27100.0*Average seed
Harefield Utd 4 Colney Heath 1 -0.2
Holmer Green 0 AFC Dunstable 3 -0.2
Biggleswade Utd 1 Haringey Boro 1 -0.1
Points
Chance Will Make Playoffs