Hi I'm just changing a few things on a site for someone else, they've had the site built but not how they wanted

I've changed the header image, bg colours etc.

But the site is too wide, have a look there's a huge amount of nothingness at the right of the shop

http://www.anniedee.com/

can anyone tell me what's causing this? I can't work it out!

Also see the way the sidebox titles are coloured purple, where in the CSS file do I change this? I want to make them green

Thanks in advance