🚀 go-pugleaf

I've been using FrameMaker for 10 years and this is the first time I've ever run into this issue.  We are using Frame 5.5.6, on Windows NT. 

I have a book file that contains several chapters.  We set all chapters to Make Page Count Even.  All of a sudden when we regenerate the book, several (not all) chapter's setting are changed to Make Page Count Odd.  I tried rebuilding the book from scratch--same thing happens. 

I deleted those files (the ones changed to Make Page Count Odd) from the book (thinking maybe they were corrupt), regenerate, and chapters that were previously fine are now changed to Make Page Count Odd. It's not all chapters, either. 

 I've tried to set up a new dummy book and add  a few files at a time to try to isolate a specific chapter.  If I generate the files in one order they are fine, then just rearrange the files and one of them changes to Make Page Count Odd.  It's not consistent enough for me to isolate this issue.  I've even tried to rebuild suspect chapters, and it doesn't seem to help.  I thought maybe there were hidden markers that somehow got embedded in the file, but I can't find anything that would cause the book to override the chapter settings.  We've got many other book files that work just fine... 

Has anyone ever had this happen to them--am I missing something?  Please help!! 

Thanks in advance, 
Beth Allphin