Originally Posted by AJ Starr
According to my experimentation, the page numbers are in the file, hardcoded as in a header. That is why they show up in strange locations. If the original epub file did not include page numbers, they would not show up.
Usually, the page numbers are not in the ePub, but are added every 1024 characters by Adobe Digital Editions, see How are the page numbers/number of pages defined?
It is possible to produce an ePub without page numbers (i.e. with page numbers explicitly turned off), but that isn't a good idea because ADE relies on "sensible" page numbers to do things like bookmarks and remembering where you are in the ebook.