Surplus end-of-flow in middle of .fm file

(FM12 on Win7)

I see surplus end-of-flow indicators, on otherwise blank pages, appear in the middle of .fm files.

Format > Page Layout > Pagination > Before Saving and Printing is set to Make Page Count Even. This is a requirement for publishing.

But I expect extra pages at the end of the file, not the middle.

The files use many insets and some conditional text. At one point, they had nested insets, but not now.

Scratching my head about this one.

Best regards,