We've now got past the formatting of the books by the Kindle conversion programs, essentially by taking steps to avoid and bypass their formatting process with the use of only .mobi input. However now we find that some books, which have been previously uploaded and attracted sales, are not included in search results on the Amazon Kindle sales pages. We can see the books from the publisher pages and they are marked as "live", but the public cannot access them. The books just dropped off the (Amazon) market after a reload of an updated text body file.
We await the response from Amazon support.