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 10 Newcastle 20 +11.2
-11.2
+1.0
Barrow 36 All Golds 6 +1.9
-1.9
+0.1
Hunslet 56 Coventry 24 -1.8
+1.8
-0.1
Whitehaven 28 Keighley 22 +1.4
-1.4
+0.1
Workington 46 London 16 -1.2
+1.2
-0.1
Doncaster 34 Oxford 16 -0.8
+0.8
-0.2
Oxford 20 North Wales 52 -0.7
+0.7
-0.0
Toronto 64 York 22 +0.4
-0.4
+0.1
Week of 7/8100.0*Super 8100.0*League 1 Shield100.0*Average seed
London 30 Hunslet 16 +2.7
-2.7
+0.1
Toronto 62 All Golds 10 +0.7
-0.7
+0.0
Newcastle 68 Coventry 20 Yes
No
+0.7
North Wales 12 Whitehaven 12 Yes
No
+0.1
Workington 30 Keighley 30 Yes
No
+0.2
York 68 Hemel 6 -0.1
+0.1
-0.2
South Wales 12 Doncaster 70 -0.1
+0.1
-0.2
Week of 7/15100.0*Super 8100.0*League 1 Shield100.0*Average seed
Hunslet 26 Newcastle 25 -0.5
York 34 Workington 0 -0.3
All Golds 4 Doncaster 42 -0.3
Games Above .500
Chance Will Win Championship