Basically, you can't do such a conversion. What you can do is delete the manual one and insert an automatic one that only references the heading Styles that you intend to include. Of course, if you've been applying those same Styles to non-headings, then overriding their formatting, those non-headings will also appear in the TOC. You need to fix the cause, not the symptoms, which you do by applying the correct Styles to the bulleted content.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]