Apologies.
I uploaded the EPUB version of On the Other Side of the Sky to the Amazon Kindle convertor and all seemed to be OK. No error message, EPUB looked great on my Kobo. I don’t own a Kindle and none of the pieces of emulation software seem to do their job on my computer.
However, when I could finally see the preview on screen following the release of the book (KDP offers an on-screen preview, but never seems to allow you to see the results of your latest upload, taking you straight to the pricing page once you’ve uploaded the new version) – all my fancy fonts had been stripped out (with no warning – thank you, Amazon) and so the nice little squiggly doodles that I’d carefully inserted came out as M and u.
In addition, it seemed that the InDesign TOC creation process had fouled up, putting Part headers at the end of the preceding chapter. Even going into the source code with Calibre, and cutting and pasting (and editing TOC files and the CSS files) didn’t seem to fix it.
So… start again with Vellum. A pain, but it works. Export from InDesign to RTF, open in Word, save as DOCX and import into Vellum, tidying up all the chapter and section divisions as I go. So as of today (December 1) the new edition is with Amazon having passed the initial checks. With luck you’ll be able to get it tomorrow. Same with Smashwords (Kobo, Apple, B&N, etc.).