Ok well I got ride of absolute numbering to section numbering and all documents update except one. As mentioned, the first doc goes page 1-36 and the rest are 8 pages each. The second one is fine and goes 37-44 but the third chapter says 45-16 (it is 8 pages) and then the remainder of chapters resume properly 17-24; 25-32 etc. I can find nothing different about the third document at all.
45-16 is not normal, so somewhere in that document the page numbering gets reset to another value. Look in the Pages panel -- it displays the page numbers, so you can see at a glance where it goes wrong. If I am correct you will find that the first page with a wrong number has a new section applied with the option "Start Page Numbering At" checked, and some random page number filled in.
Yes absolutely correct Jongware. I saw the second page in the pages panel went back to page ten. Couldn't see the section applied though so I just recreated that chapter based on the template and replaced doc. All is good now.
Now on to trying to get that darn TOC formatted correctly