Reactions dont sort on date

Hello!

I am fairly new at using wordpress but i can fix all problems i encounter sofar. But now i am stuck. I use the dutch version, and i will try to translate the buttons as correct as i can. might be a small problem..

the problem
i want my reactions to be sorted on date. Right now the order is new ones on the bottom, but i want the newest on top.

What dit i do sofar to fix?
In the admin –> options –> discussion–> Here i found: Show reactions with Old/New reactions on top. (freely translated)
i used old and new, but neither seems to have effect on the sorting.

What can i do?

btw: the site i am working on is: https://pfp.digibak.nl