I try to delete pages multiple ways and cannot:

From the Organize Pages feature, I select the pages that I want to delete and I click the delete icon. Acrobat responds that "One or more pages are in use and could not be deleted." Sometimes when I receive that message and close the Organize Pages feature, I see that the pages were deleted. But not always.

From the main document, if I click the Delete Pages icon and enter the page numbers to delete, I get the same error. When the Delete Pages icon work, the feature is still problematic because it requires that you enter the page number -- sometimes this is the printed page number, other times it is the actual number in the document. It's never clear what to enter.

This is like your flagship product and perhaps the most basic feature possible -- deleting pages --doesn't work.

I'm left dumbfounded.