Mystique Side Bar widgets

I’ve selected to only have 1 widget show up on the side-bar and this works fine on the interior pages but on the homepage there are 2 showing up. And neither of those two do I have selected: http://500hpc.com/ How do I get rid of them? I’ve just today started playing with the widgets. What I really want that area for is for advertising. How can I set that up? Should I find a banner ad widget? (sorry I’m new to word press) Unless one of the widgets this theme comes with allows me to drop in jpgs and link them. Thanks