Hello Lynna,
You have asked an intriguing question.
The consensus is, the the specific headings you reference are part of the transcriber pages. Since these pages are not part of book, the information on these pages follows the specific guidelines in their relevant sections of braille formats.
Specifically, the two sections mentioned (2.6.1a & 2.5.2a), state exactly where both headings are to be placed. Since there are specific guidelines for these headings, our belief is that you should follow 2.6.1a & 2.5.2a irregardless of the text on the previous page.
Thanks for the question. We will be adding it to the list of items for the BANA committee to consider.
Mike