Not that it really makes any difference, I usually cut the multideck around 1 deck from either end of the stack.

The other day I had a dealer in AC tell me that it needs to be 1.5 decks from the end.

Now instead of getting into an argument, I just moved it in a little. The CC rules say the card only has to be 10 cards in from either end. Has this rule changed or is this dealer in the wrong? Can a casino make up a rule like this on the fly?