Okay I figured out how to
actually rub the plugin (doh!)
A screenshot is here:
https://librelamp.com/ePubCheck.png
(too big IMHO to embed in post)
The grayed out entry is because it is a magazine for mature audience and that entry isn't safe for people at work.
The not referenced emoji's are just not referenced
yet, lots of content still needs to be added. Ignore that error, not what this is about. They'll be referenced as I port LaTeX to HTML5 article structure.
For the multiple tables of content -
The "Submission Fiction" ToC is for user submitted stories - the main focus - which are also stories about consensual BDSM submission - so its a pun.
The "Thoughts and Prayers" ToC title I confess is intended as a poke at evangelical capitalists.
The "Eye of the Beholder" ToC that doesn't yet exist will be for interviews and tasteful glamorous photo shoots.
In the spine the content will be mixed, e.g. a poem and a photo shoot will come between two stories. So multiple ToC makes it easier for the reader looking for something specific to find it. Which is exactly why the classic pulps of yesteryear did it. The pulps are not given enough credit, I love them.
Anyway I suppose I could just remove the epub:type="toc" from all but the first HTML5 nav element.