I don’t understand the what the big deal is. Okay a person misunderstood and picked a player not available.
Okay, mistakes happen. There are still lots of good players to pick from, repick time.
It is not like the pick was made and a few more picks were done, then the mistake pointed out.
Then he is told, too bad so sad etc and he was penalized for the mistake (missing out on the players taken after his mistake).
He is still up and can just make a another pick. No harm done.