Yes, sure, let me explain it properly.
The problem is that, if, for example, i have a folder with names from 0 to x-1 (a total of x pages), then the reader, when opening the folder, sees 2x+1 pages, the first x+1 of them being black with a question mark. After that, the last x pages are the normal pages. I don't know what could be the issue, as this thing happens with some images and not with the others.
https://www.box.com/s/1n3ngrbflvf22jiqb80j This is the attached archive, with examples of screenshots, showing the black page, the actual first page, and the nomenclature of files