As I said, I have had a look and made changes to the structure to avoid perverse promotion / relegation issues due to the one team per division rule.
After allocating divisions according to the Winter 2011 rulebook, it was apparent that the rule that no club can have a team in more than one division would have an adverse effect on the competition. In the first allocation into divisions, the entire second division could not be promoted into the first division because they were all "B" teams, and this scenario would have caused division 3 teams to be promoted straight into division 1.
As a solution, I have made the second and third divisions bigger, allocated teams according to the winter 2011 rulebook, and drawn teams at random into two groups. See the revised divisions here.
There will be three teams promoted and relegated from each division to accommodate this change. See the revised rulebook for details.