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*League Two100.0*Average seed
Colchester 0 MK Dons 2 +1.5
-0.3
Bury 2 Scunthorpe 1 -1.2
+0.0
Bury 0 Oldham 1 +0.7
-0.1
Oldham 1 Yeovil 0 +0.6
-0.2
Notts County 3 Colchester 1 +0.5
-0.2
Scunthorpe 1 Walsall 1 -0.4
Shrewsbury 0 Bournemouth 3 +0.1
Week of 4/20100.0*League Two100.0*Average seed
MK Dons 0 Scunthorpe 1 +6.0
-0.1
Colchester 0 Shrewsbury 0 +0.1
-0.2
Oldham 2 Crawley Town 1 +0.1
-0.2
Week of 4/27100.0*League Two100.0*Average seed
Scunthorpe 2 Swindon 1 +22.6
-0.2
Carlisle 0 Colchester 2 No
+0.6
Leyton Orient 1 Oldham 1 -0.1
Points
Chance Will Win Championship