I had the same issue repeatedly occurring where I was deleting blank pages but they were being duplicated. Adobe isn't keeping up with how fast I am working. When I click to delete the blank pages, it thinks I am dragging the pages which then duplicates more blank pages. It wouild be nice if Adobe could implement a feature to recognize when there are blank pages in a document and have an option to auto remove them, or at least keep up with the "clicks" and not think they are "drags".