The way those nav blocks work is that each item is floated left, with a right margin of 30px. This way the whole thing is fluid, as the width of those bounding boxes change depending on the overall width of the browser window.
We could put all the choices in a single column, like this:
Not sure if that is any better? We’re considering some changes to that whole nav section up there now, so maybe this thread will resolve itself soon enough.