The numbers on the right side are usually page numbers. So if your reader displays part of page 3 and 4, then somewhere on this page you'll have a 4 on the side, indicating where page 4 starts.
On the bottom you'll have something like 3-4 as page display. Only if you are completely on one page, the page display on the bottom will show a single number.
I never tried to turn this off as it didn't bother me. So sorry, I cannot help here.
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