I called my local store and learned that the Store Director can actually determine special offers such as this, so double coupons is definitely not available in all locations. I asked my store if they were doing this soon and she had not heard.
So, it might not be a bad idea to stop by Customer Service when you are there and ask if they are going to start this soon. You never know when your comment will fall on the right ears!
Thanks to Sharon for passing this along to me!