1 of the worst ruling ever seen tbh, also dealers/ppl will always make mistakes but to say its his fault yes but to say if he does this 2 times in his life he should lose his job is a even worse decision.
Its a standard rule were i come from that if this situ occurs then u shuffle the remaning cards left in the deck & burn/turn simple.
the worst ruling i ever seen in a casino was a player getting his KK back out the muck in a large pot on the river after the dealer mucked his cards accidently, it was a reg v a non-reg surprise surprise. Yup he won pot with Kings full