What you quoted appears to be the <head> tag of the document, so I don't see how there can be an <h1> there. I also looked at the source of the main page of your site and only see 1 <h1>.
Oh, you're actually referring to the <title> tag. I can see 2 of them in your source. It looks like one has been added by your customizations as it's before the <html> tag.
