The screenshots you pointed to are mild examples, in some of them I can#t detect more than a hint of ghosting.
for a rather extreme example look at this:
https://www.mobileread.com/forums/att...achmentid=1133
or this:
https://www.mobileread.com/forums/att...achmentid=1145
in the secon creenshot, when you enlarge the file to full size, you can actually read the text in some places. the fact that the picture was taken using better "sharpness" than the ones in my thread help identify the ghosts!