The file in question does not have any other sections, page numbering starts at 1, and Smart Text reflow is off. What I noticed, however, was that the bottom of the Pages/Links window that I had open on the lefthand side of the screen appeared to run on below the bottom edge of the monitor, leading me to think that there were, in fact, thumbnails for pages 46-49 in the window but that I just could not get at them. So I closed the Pages/Links window, reopened it, found that its bottom was now aligned with the bottom edge of the monitor and that I could now scroll down to the bottom of the thumbnails where I found 46-49. I selected those thumbnails as per standard OP, dragged them to the Trash Can, and they are gone gone gone.
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