Issue with sub-menus

Hi just bought wanders. There seems to be an issue with the template. I created the sub-menus like in the demo site. But, when users mouse-over the Submenus, it breaks up (see attachment). Can you help?

Also something looks really off with the look of the template. It doesnt look like the demo..for example the fonts, font sizes, and the footers are not centered. It's a fresh install.