It probably was some sort of mistake but even the person who replied before me said they got the same discount and I do know of others so it obviously was not just me. I don't think everyone necessarily did and I didn't hear of anyone who got it last year but who knows it's worth a try. I do understand that technically Disney does not stack discounts and you either get one or the other so I was pleasantly surprised when it happened and even questioned the
AAA agent who told me it was the best offer she had ever booked and was surprised herself.
To be honest, I just didn't understand the uproar it caused when I mentioned it in 06, on another disney list not the DIS, because I actually had a
travel agent send me a private message telling me not to post such things because I was lying since it was impossible. Personally, I think that particular travel agent was afraid it would take business from them and give it to AAA but it became a pretty heated discussion despite other people saying they also got the same discount.