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
Notts County 3 Colchester 1 +0.9
Swindon 4 Crewe 1 +0.2
Crewe 1 Doncaster 2 +0.1
Carlisle 1 Preston 1 +0.1
Colchester 0 MK Dons 2 -0.1
Stevenage 0 Yeovil 2 +0.1
Crawley Town 2 Coventry 0 -0.1
Week of 4/20100.0*Average seed
Doncaster 0 Notts County 1 +0.8
Crawley Town 1 Preston 0 -0.3
Coventry 0 Leyton Orient 1 +0.2
Yeovil 1 Crewe 0 +0.1
Oldham 2 Crawley Town 1 +0.1
Preston 1 Tranmere 0 -0.1
Bournemouth 3 Carlisle 1 +0.0
Week of 4/27100.0*Average seed
Notts County 2 Coventry 2 -0.2
Crawley Town 2 Hartlepool 2 +0.1
Tranmere 0 Bournemouth 0 +0.1
Stevenage 0 MK Dons 2 -0.1
Points
Chance Will Win Championship