Google should not be complaining about the multiple urls that work for your home page because in all cases the canonical url link is rendered in your head element indicating the authoritative url for the page:
<link rel='canonical' href='http://www.yachtlogsoftware.com/1home.aspx' /></head>
though 1home.aspx is not the prettiest url and it probably did get that way by deleting and re-creating your home page somewhere along the way.
For more information see Optimizing Your Home Page Url for SEO, as well as this blog post from google about canonical urls.