How are these numbers calculated?

Big Games

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

Week of 7/1100.0*Super 8100.0*League 1 Shield100.0*Average seed
Doncaster 34 Oxford 16 +1.4
-1.4
+0.3
Doncaster 10 Newcastle 20 -0.7
+0.7
-0.8
Barrow 36 All Golds 6 +0.1
-0.1
Whitehaven 28 Keighley 22 +0.0
Toronto 64 York 22 +0.0
Week of 7/8100.0*Super 8100.0*League 1 Shield100.0*Average seed
London 30 Hunslet 16 +0.2
-0.2
North Wales 12 Whitehaven 12 Yes
No
South Wales 12 Doncaster 70 Yes
No
+0.2
Workington 30 Keighley 30 Yes
No
+0.1
York 68 Hemel 6 -0.0
Newcastle 68 Coventry 20 -0.1
Week of 7/15100.0*Super 8100.0*League 1 Shield100.0*Average seed
All Golds 4 Doncaster 42 +0.3
Hunslet 26 Newcastle 25 +0.3
York 34 Workington 0 -0.2
Games Above .500
Chance Will Win Championship