im currently making this site and have a few css errors

http://www.yamaha-jetskis.com

http://www.yamaha-jetskis.com/style.css

1. the nav bar in ie doubles the image under it how can i stop this?

2. on the left you see a box with all the models listed there. to the right of that i want a box for google adds. how do i add this box with out making a big gap i cant ge it to work?

thank yo guys and girls