The information I was provided about the double points for My Coke Rewards and Diet Coke products was incorrect. Instead of double points, it is an additional 10 points added to your account when you enter 5 codes this week. Sorry for the confusion and misinformation.
Keep in mind that you will more than likely NOT see your additional points credited immediately. Most of the time that takes several days after you enter your codes when they offer bonus points such as this.