buckworks - 2:44 pm on Jun 28, 2010 (gmt 0)
Multiple H2 headings is not necessarily a mistake. The number of h2's that makes sense would vary according to the logic of the content.
Think back to the essay outlines they made us do back in junior high school. Try to organize your headlines and sub-headlines like a good essay outline. That's the goal, semantically; visually you can style things however you want.