I don't do a lot of books, so I haven't seen this myself, and I don't recall a lot of others here mentioning it. I wonder, though, if that third-party plugin might not be the source of the problem?
I would approach this as having all the files for the book in the correct sequence and insert anything inbetween these in the Book File.
I'd make a PDF of the book file. Then a pdf of the inserts and use Acrobat Pro to add the inserts to the book pdf.
to be honest: I would do EXACTLY what Eugene suggests: Wouldnt even think of doing it differently.
but: you shouldn't be having that issue: could be the plug-in or something in your workflow / settings .... (ncluding insert blank page for eg)
can u upload screenshots of the settings you have selected or atleast break them down?
here is an example of one of our bookfiles. Chapter 31-col-architiecture (pages 284-287) is a colour section that slots into chapter 32-architecture-rom7 (pages 280-294). When this colour section is first added to the bookfile it automatically repaginates the first page to page 295, picking up from the previous chapter rather than maintaining the specified pagination (as seen, corrected, below) and throws the entire bookfile out. By doing so, it also flips the the document to start on the opposite page which has on occasion caused havoc with masterpages. Note it is not possible to physically insert the colour section into the chapter to produce a single chapter due to paragraph styles having the same names yet differing attributes (due to it being a colour section yet the content structured in the same way as the rest of the book).
our settings are as follows:
in the bookfile....
in each chapter.....
i suspect its the bookfile numbering options that arent able to be over-ridden which is the issue?
Note that we need these files in the bookfile for both indexing purposes and cross referencing purposes, and the third party pluggin we use is Typefi which is unlikely to be the issue...
I'm still not entirely clear on what you are doing, but ...
Note it is not possible to physically insert the colour section into the chapter to produce a single chapter due to paragraph styles having the same names yet differing attributes (due to it being a colour section yet the content structured in the same way as the rest of the book).
The first thinpg I would do is rename those styles to, for example, <stylename>_COLOR and eliminate that problem...
yes, renaming our styles sounds like a simple solution but not feasible for a plethora of reasons, mostly due to how are content is managed in production ie. autolayout with typefi, and then exported as cxml for ebooks etc. Which brings us back to the issue of problematic bookfiles...
It seems to me that your current workflow is not working. That, to me, means you need to fix the workflow.