I have a 300+ page catalog, and there are around 10 separate ID files, each a Section. So, the page numbering is not 1, 2, 3, but actually in this case, 260, 261, 262.
I was having problems with the one section crashing, so I exported as IDML, opened back up in ID, and saved as a new .indd file. Seems to have fixed my crashing problems, which is good, but now all the pages start at 1, 2, 3 again, and no longer act as a section.
How would I fix something like that?
When a files crashes often there is some corruption in this file. I think you should be happy that you could open the idml and save and work with it. Maybe that the corruption was connected with the section numbering. So I would recommend to reconstruct this section numbering.