By definition a contact sheet contains one and only one print of each selected photo
a piece of photographic paper onto which several or all of the negatives on a roll of film have been contact printed.
If you want something different - multiple copies of a single photo then you need to do that
Select the photo, click print, select the printer, paper size and print size, click customize, in settings (the gear at the bottom) select multiple copies of a photo -the preview will display what is gong to print - and click print - set any printer specific settings and print
LN