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
Carlisle 1 Preston 1 -0.2
Stevenage 0 Yeovil 2 +0.1
Crewe 1 Doncaster 2 +0.1
Notts County 3 Colchester 1 -0.1
Swindon 4 Crewe 1 +0.0
Shrewsbury 0 Bournemouth 3 +0.0
Week of 4/20100.0*Average seed
Bournemouth 3 Carlisle 1 -0.2
Preston 1 Tranmere 0 -0.2
Crewe 1 Sheff Utd 0 -0.2
Crawley Town 1 Preston 0 +0.1
Yeovil 1 Crewe 0 +0.1
Swindon 3 Stevenage 0 +0.1
Week of 4/27100.0*Average seed
Carlisle 0 Colchester 2 -0.7
Sheff Utd 0 Preston 0 +0.1
Stevenage 0 MK Dons 2 +0.1
Points
Chance Will Win Championship