Windows says there isn't any "calibre5" in the directory, though, outside of the stylesheet I already posted. Either Windows isn't searching the HTML contents, or it isn't actually used.
I can see this isn't working.

I don't speak the code and ya'll need something to look at. Since I can't post the copyrighted Fredle, can we look at the Twain story. This is the version I have, attached.
It has the same
bolding problems, and this way we can all look at the code directly instead of telling me what to search for.