How are these numbers calculated?

Big Games

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

Week of 4/20100.0*Average seed
Witton Albion 3 Matlock Town 0 -0.2
AFC Fylde 0 Stafford 1 -0.2
Matlock Town 3 Kendal Town 0 +0.2
Blyth Spartans 1 Grantham Town 0 -0.1
AFC Fylde 3 Frickley 2 +0.0
Nantwich Town 3 Frickley 2 +0.0
Week of 4/27100.0*Average seed
Matlock Town 1 Worksop Town 5 -0.1
Matlock Town 1 Ilkeston FC 1 -0.1
Stafford 2 Nantwich Town 0 -0.1
Eastwood Town 1 Blyth Spartans 4 -0.0
Week of 5/4None
Points
Chance Will Win Championship