lucy24 - 2:19 am on Jun 2, 2013 (gmt 0)
You don't say what SEO software you're using or ::cough-cough:: how much you paid for it. Well, you're probably not allowed to. But when I saw the topic header the first thing that came to mind is that all headings-- not only h1-- default to bold unless you've told the browser otherwise. (They are also left-aligned and in ridiculous sizes, but never mind that.)
Other than that, it may not be an html question at all.