Soft Hand Value

Recently there was some poll on this forum that asked if a person should be paid playing double deck BJ while doubling down on A8 and then drawing a 2 while the dealer draws to 17. The rule was something like a player can only double down on 9 10 or 11. I think the ruling was that the player lost because he ended up with a value of 11. So my question is this - Using the same reasoning as those gaming commissioners, then why would a player get paid for the "Lucky Lucky" side bet if the player happens to have a BJ and the dealer has a face card showing. In order to win Lucky Lucky, the players first 2 cards and the dealer's face up card has to add up to 21. If you win the LL side bet, that means you count your hand as 11 which isn't a BJ. Yet, the casino pays out for both. So how does this work?

Just a W.A.G. -

Ace is one or eleven.

In the A,8 DD situation, because the house rule is DD on 9, 10, 11, then you've decided that the Ace is a 1. You can't change your mind after hitting a deuce. If the house rule is DD on anything, then A,8 and a DD for a 2 is indeed 21.

On the flip side, the Lucky side bet is a completely separate transaction. For the side bet, you decide that your Ace is worth 1, while at the same time, for the main game, your Ace is 11.