How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Serie A100.0*Average seed
Icasa 2 Paysandu 1 +26.0
+1.0
Sport Recife 2 Parana 0 -8.0
-0.2
Guaratingueta 0 Ceara 1 -6.5
-0.2
Oeste 2 Figueirense 2 +1.6
+0.0
America-MG 3 Atletico-GO 0 -1.0
Sao Caetano 3 Joinville 2 +0.8
Avai 0 America-RN 1 +0.6
Week of 11/22100.0*Serie A100.0*Average seed
Icasa 1 Chapecoense 2 -28.1
-0.7
Palmeiras 4 Ceara 1 +8.8
+0.2
Boa Esporte 2 Sport Recife 3 -8.1
-0.2
Figueirense 2 ASA 0 -6.5
-0.2
Joinville 2 America-MG 1 +1.4
+0.1
Week of 11/29100.0*Serie A100.0*Average seed
Parana 2 Icasa 0 -29.5
-0.6
Bragantino 1 Figueirense 1 +6.7
+0.0
Ceara 0 Joinville 3 +3.6
+0.3
Points
Chance Will Win Championship