Moving users in the waitlist breaks when scrolling

[goto-bus-stop]

I tried to move someone from spot 23 to 2, but i had to scroll up, and it moved someone else to 2 instead.

I'm guessing that it's because the waitlist "lazy" renders, so the user displayed by the Nth rendered element changes while scrolling. Eg. when scrolled all the way down, only the last 15 users are rendered, so the 14th item is spot 23. But when you scroll all the way up, only the first 15 users are rendered, so the 14th item is spot 14 instead.