Gap of Acrylic

I could keep this gap from happening if I just used a couple more spots of tacky wax, but I really don't think it's necessary. It isn't noticeable when you're looking at it from the front of the house, and besides, the dust doesn't really get in through the gap anyway. How do I know this? When I was (stupidly) sanding the Princess Anne in my craft room instead of the garage, I wound up with a thin layer of dust on EVERYTHING in my room... except the McKinley furnishings!