The code looks like the remnants of a hyperlink, just the name part with no link.
Unless you know something about it, the code does nothing so remove it. You can remove those topics from the TOC and add them back in or just rename them in the TOC editor.
See www.grainge.org for RoboHelp and Authoring tips
A link with only a name attribute is a bookmark anchor. You can jump to such a bookmark using a hyperlink. Removing it may break some hyperlinks... The correct syntax however is: <h1><a name="ovr"></a>Overview</h1>. If you correct this, does this solve the wrong label problem?
As for the Headings, do they correctly come through in your topics, or does RoboHelp turn them all into H1?