This happened to us too, we originally tried to book POFQ 2 months ago with free dining but there was no availability, so we went with AKL (going Deluxe for the first time). Now today, there's nothing available with our trip at AKL but POFQ has availability for the free dining! We've got our hearts set on AKL now though, so we're keeping the original reservation. I think it's a plot by Disney to make Deluxe guests out of us.
It might just be a plot! But I have heard so many great things about AKL so I hope you have a great time! We could have gotten the FD the first time around but only if we downgraded to a pool view and we had our hearts set on club level so we passed. But it was a really slow day at work yesterday so boredom won out and I started poking around and boy am I glad I did! We had planned on paying rack rate for everything so we could get exactly what we wanted so this is just such an awesome perk!