Originally Posted by
tableplay
You made no mention of doubling a 2nd time, until it was pointed out that this was something that should be done if the player's total warranted it. The only thing you mentioned was to hit again or stay as one's choices prior to that - so this would cover the case of what to do next after receiving a duck with 9 in the bag.
Honestly, I didn't think it necessary to specifically say that. You could take a second action after the initial double. If you could re-hit, I assumed everyone would understand you could re-double.
I am also not familiar with these terms: Duck with 9 in the bag.

Very colorful.