I don't think your signature will help having exactly the same URL for 2 links.
Try "Web & Website Design"
Google's spiders ignore the little words like "and".
I'm not 100% sure but your signature could be holding things back. Try to put a few more keywords in there but only one link.
Edit: Adding on to the above - try to make your menu links a little more detailed - take an angle on trying to make them common search terms.
Personally I wouldn't use in my Google search term the word "design" I'd opt for "Template".
Maybe I am the only one so do not take my word for it - do some research