I made a simple 3 page document, double spread, to play around with Sections.
I inserted the text "Chapter x" (x=1,2,3) at the top of each page to keep track of them.
I then created a section for each 'chapter', i.e. the first started on physical page 1, the next on page 2, etc
I then inserted two new pages before page 2.
The sections automatically updated and the section for "Chapter 2" now referred to physical page 4. All well and good.
Next I deleted the two new pages, i.e. physical page 2 and 3
This time around Section 2 (correctly) pointed to physical page two, but Section 3 vanished. As a result, my Chapter 2 and 3 were incorporated into Section 2. I can only imagine how this would play havoc with a lengthy document with many chapters and sections.
Is this how it's intended to work or a bug?