Child page creates hover issue

Hello,
I’m pretty new to wordpress, so apologies if this is a simple fix that I’m overlooking. I have scoured the codex and support forums with no luck.

I just installed WP-eCommerce plugin. Doing so created child pages for the ‘product page’, which is called ‘ordering’ in my site. Now when I hover over ‘ordering’ the entire menu shifts to the right, and the header image above pulls down.

I added a child page to one of my other pages, and it caused the same issue, so I know its not an issue with the plugin.

I’m stumped! Any help is greatly appreciated
site – http://boverbags.com/beta/