First: Thank you for the work you've done. I don't have the time to manage coding a contact form, so without this or a similar effort, I just wouldn't have one.
Second: However, upon opening the page with the form, a second page entitled "Subpage" is generated. I've checked to ensure I don't have a subpage generated, for some reason, in the header navigation. The link has the same page ID as the page on which I'm housing the CF 7 code, but with an anchor "#". I've verified that I don't have any subpages defined.
Any help here would be appreciated.