234568 Wordpress Margin Problems

I need help on a website I built. I tried to make a wordpress theme blend seamlessly with my existing website, both are hosted on my server. I altered the [login to view URL] file to look like the top of the rest of my web site pages, but I can't get the margins right. There is a slight margin on the right and the top of the page. Also need help cleaning up the code, so it runs faster than messy code. Attached are the two original files I used to merge, and the new [login to view URL] that has the slight margin problem (the version that's online now). I want everything to line up perfectly. It's only off by about five pixels. I just can't figure out what's causing it. Also I need to make the background no longer fixed. The web address is [login to view URL]