I was totally hoping they'd lift the limit of 1, and they have! This was not announced and something I stumbled upon (been checking off and on since all levels got to redeem for rewards) and was pleasantly surprised today!
If you have already redeemed for a 12 pack coupon for just 30 points already, you can redeem for a total of 4 more. Remember, too, your spouse/of age child in your household can also have an account and are able to redeem from their accounts also.
My Coke Rewards site
This deal is now DEAD! Hope you got some!