[JaredL]

How many Cubans will be left on their team a week after they play at the US? Similarly, how many North Koreans will abandon after they play in Seoul?

guilt,

Concacaf is confusing. Bump Bailey has given you the draw. So the US plays the winner of Dominica and Barbados in a home and home. The winner there is put into a group with the 3 other winners. These four teams play in a group, playing each team twice. The top two teams from that group are put with the top 2 teams in the other two groups to make a 6-team group. There you play everybody twice. Top 3 go to the finals and fourth plays the 5th team from South America.

It's actually not that far off from the Champions League when they did the group stage twice. It's basically:
Qualifying Round 1 (QR1)- bottom 24 teams versus each other
Qualifying Round 2 (QR2)- top 12 teams each face a winner from QR1
Group Stage 1 (GS1) - winners from QR2 put into 3 four-team groups
Group Stage 2 (GS2) - top two from each group in GS1 put in one 6-team group.

Top 3 advance, fourth plays 5th team from South America.

It would be much easier to grasp if they just played the rounds then did the draws.