If I might suggest, if you upgrade to WD Premium 7, and I believe Xara has a special 30th anniversary upgrade program on, the nav bar will be treated as a header and will remain the same distance on all pages. Same with a repeating object at the bottom of the page which is treated as a Footer.

I might also suggest eliminating all of your animation on your home page. I feel like my senses are being senselessly assaulted with all the stuff vying for my attention. Focus!!!