Is it possible to share a link to your website, or a screenshot so I can better understand what your talking about?
Stephen,
Thank you for sharing your link privately with me.
The reason why it is saying “Sitemap” I believe is because you did not declare a blog archive in your “Setting” -> “Reading Settings” -> “Post page”. This is where the posts title heading is from.
If you wanted to change it in a upgrade safe method you could also hide the title with CSS like:
#sitemap_posts h3{display:none;}
As for duplicate content penalty, you have nothing to worry about there. Google will not penalize you for having an H3 with the same text content as your H1 header on a single page.
Hi Daniel!
What if I’d like to just call it “Posts” – how do I go about doing that? Compared with a few other plugins this one is easily the best and cleanest but this is the only thing that bothers me a little.
I second Chalaim’s claim.
Not all themes necessitate the specification of a posts page, so it would be handy to be able to manually change that title in the plugin settings somewhere.
I 3rd that.
I will try to add that feature in the next version. Possibly in the next few weeks or when I get time.