Okay, now I do have a Sigil-specific question to go along with this! When you choose "Generate TOC" - is that what creates the ncx file? And if I were to edit the ncx file after-the-fact, would that affect my TOC? I'm thinking the "problem" is something to do with the navpoints and the way they are being nested in the ncx file... I would like my subheaders in the TOC itself so people can look up things in detail - but I don't want each little subheader to be included in the feature that Kindle's 5-way button uses to skip to the next "chapter" - that would be way too many.
Is there any way to do this?