Double entries in TOC

[Charlie Kyle]

How does FM know what TOC style to associate with a heading style? I
have three instances of TOC entries that show up twice: once correctly
and once incorrectly. The duplicated TOC  entries each use a different
style. The style for the correct is an override. Is there a way to tell
what part of the style causes the override?

Here's a rough sample:

**********************************************
About This Guide                  <Correct> <override TOC style =
ctp_ChTitleTOCPlain>

Chapter 1 About This Guide        <Incorrect> <TOC style =
ct_ChapterTitleTOC>
          Section Title
          Section Title

***********************************************

Same thing for the Glossary and Index.

Thanks,
Charlie Kyle