If this is epub2, then your html TOC is probably still set as the toc in your opf guide. In Sigil's BookBrowser, if you hover the mouse over your html toc file, what "semantics" are set?
The NCX is required in epub2. You control what gets put there by your use of h1, h2 , h3 tags throughout your epub.
Last edited by KevinH; 11-15-2021 at 08:21 AM.
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