How are these numbers calculated?

Big Games

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

If winner is:HomeDrawAway
Week of 9/20100.0*Chance in playoffs100.0*Average seed
Italy vs Canada-18.6+2.1+18.5
-2.6-0.1+2.6
Italy vs Namibia+0.0-1.4+0.0
+0.0-0.2+0.0
New Zealand vs South Africa+0.0-1.4+0.0
+0.0-0.2+0.0
Japan vs Russia+0.0-0.0-0.1
Ireland vs Scotland-0.0+0.1-0.0
Russia vs Samoa-0.0+0.1-0.0
England vs United States-0.0+0.1-0.0
Fiji vs Uruguay-0.0+0.1-0.0
England vs Tonga-0.0+0.1-0.0
France vs Argentina-0.0+0.1-0.0
Australia vs Fiji-0.0+0.1-0.0
Wales vs Georgia-0.0+0.1-0.0
If winner is:HomeDrawAway
Week of 9/28100.0*Chance in playoffs100.0*Average seed
New Zealand vs Canada-18.6+2.1+18.5
-2.6-0.1+2.6
South Africa vs Namibia+0.0-1.4+0.0
+0.0-0.2+0.0
Japan vs Ireland+0.0-0.0-0.1
Scotland vs Samoa-0.0+0.1-0.0
Ireland vs Russia-0.0+0.1-0.0
France vs United States-0.0+0.1-0.0
Georgia vs Fiji-0.0+0.1-0.0
Georgia vs Uruguay-0.0+0.1-0.0
Australia vs Wales-0.0+0.1-0.0
Argentina vs Tonga-0.0+0.1-0.0

What If

Chances based on how well the Canada finish out the regular season.   Explain

100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-OTLDplayoffs1234567891011121314151617181920Count
164-000In52351211,679,069,259
143-001In1444338000169,650,825
123-01097.1%210192220157230006,702,025,101
2-002100.0192127231451006,442,450
102-01179.7000212272811182000508,901,039
1-00384.90041529271013200108,535
82-02025.00000138121315141311620000010,053,143,598
1-01219.700002612101518171262000012,880,464
0-00414.515941527231431743
61-0210.000002924332381000508,953,695
0-0130.4000182534227100108,768
41-030Out000139151820181246,702,082,582
0-022Out0000151629281746,436,956
20-031Out0006264425169,608,115
00-040Out1931591,679,085,470
Total:40.0%4555555565555555555528,198,497,600
Points
Chance Will Make Playoffs