A problem that has really confused me...please help

[dpape]

Alright, i usually only post about poker on here, but I got a different situation here. I would appreciate any help. I am in a fatansy football league, 10 people. I play with a bunch of tight asses...and the original idea was to all pay 10 dollars. After week two though, I have made it clear to everyone we need to at least go to 20 bucks a person. So, how can we adjust the total buy in to accamodate to those who are 0-2? Here is the situation. 6 teams are 1-1, 2 teams are 2-0, and 2 teams are 0-2.
Question 1) What % chance of winning does each team have of winning...assuming each team has even chance (10%) at the start of the season.
Question 2) If the base buy in is now 20 dollars, how can the buy in be ajusted accordingly.

Exclude the strength of schedule and strength of each team for future.
Thanks guys. D Pape