Technically, in most casinos, splitting with 10-cards and being dealt an Ace to one of your 10's is not considered a natural BJ, so it's correct that it's only paid 1:1, which it was, as far as I could tell.
But it still allowed me to hit. I don't see why anyone would want to, and any other situation in which your sum is 21, the game automatically skips your option. This treated it as a "soft-21", the only benefit I could see is if you were playing for the 7-card jackpot.