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
Whitehaven 28 Keighley 22 -18.1
+18.1
-1.0
Barrow 36 All Golds 6 +4.1
-4.1
+0.2
Hunslet 56 Coventry 24 -3.2
+3.2
-0.1
Doncaster 34 Oxford 16 -1.5
+1.5
-0.0
Workington 46 London 16 -1.3
+1.3
Doncaster 10 Newcastle 20 -0.8
+0.8
-0.0
Oxford 20 North Wales 52 -0.7
+0.7
Toronto 64 York 22 +0.1
-0.1
+0.1
Week of 7/8100.0*Super 8100.0*League 1 Shield100.0*Average seed
Workington 30 Keighley 30 -8.1
+8.1
-0.4
Toronto 62 All Golds 10 +6.8
-6.8
+0.2
London 30 Hunslet 16 +6.5
-6.5
+0.1
North Wales 12 Whitehaven 12 -5.5
+5.5
-0.1
York 68 Hemel 6 -0.1
Barrow 80 Oxford 10 +0.1
Newcastle 68 Coventry 20 -0.1
South Wales 12 Doncaster 70 -0.1
Week of 7/15100.0*Super 8100.0*League 1 Shield100.0*Average seed
Keighley 92 Oxford 6 +45.0
-45.0
+1.1
Coventry 13 North Wales 36 -6.7
+6.7
-0.3
Hunslet 26 Newcastle 25 -5.7
+5.7
-0.3
All Golds 4 Doncaster 42 +4.9
-4.9
+0.2
London 36 South Wales 16 -0.8
+0.8
-0.1
York 34 Workington 0 +0.1
-0.1
+0.2
Games Above .500
Chance Will Win Championship