This may just be me, but on S79, I redeemed twice to get summon scrolls that was meant to take me from 8 to 10 for a draw. But I checked to do the draw and was still stuck on 8. I don't have a screenshot of before and after as I just thought it would work, but I will try again later and see if it happens again.

Every other redeem seems to work, but the summon scroll isn't giving me anything, which is rather frustrating.