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
Hillingdon Boro 4 Tring Athletic 0 -0.5
Hillingdon Boro 1 Colney Heath 5 +0.2
Oxhey Jets 2 Biggleswade Utd 0 +0.1
Biggleswade Utd 1 Hanwell Town 2 +0.1
Leverstock Grn 0 Harefield Utd 2 +0.1
Holmer Green 0 Hertford Town 5 -0.1
Ampthill Town 3 Leverstock Grn 0 +0.1
London Tigers 2 Aylesbury Utd 6 +0.1
Berkhamsted 2 Hertford Town 2 +0.0
Week of 4/20100.0*Average seed
Colney Heath 2 Tring Athletic 3 +0.5
Leverstock Grn 4 Hadley 2 -0.3
AFC Dunstable 6 Leverstock Grn 2 +0.1
Ampthill Town 3 Hertford Town 1 +0.1
Hillingdon Boro 0 Holmer Green 1 +0.1
Hertford Town 1 London Tigers 0 -0.1
Hatfield Town 1 Biggleswade Utd 4 -0.1
Hertford Town 0 AFC Dunstable 1 +0.1
Week of 4/27100.0*Average seed
Tring Athletic 0 Ampthill Town 2 -0.3
Leverstock Grn 1 St.Margaretsbry 5 +0.3
Points
Chance Will Make Playoffs