I'm thinking that it's just going to be 1 person, 1 group. No one will be able to have more than 1 center going. It's hard when you have 2. Believe me, I know. And yes...life does get in the way, I know TOO well about that!
I will have names set aside for those that are actually wanting to do 2 centers, but those people will be set aside to step in in case someone has to drop out. Then, one of the people who would like to do 2 centers can step into the spot of the one that has dropped out.
Clear as mud?