Problem with Images on front page of Auto Focus Theme

I am using the Autofocus 2.0 lite theme, but for some reason the images on my front page are not filling up the slots like they are supposed to. The uploaded images are plenty large enough, so that is not the problem and I am not sure what could be causing this. Here is a link to the site so you can see what I am talking about. If you have any ideas, please let me know! Thanks!