Amazon never seems to get the release quite right for Paizo products. Probably in about a week it will be available.
Weird. I ordered the entirety of Rise of the Runelords via Amazon and never had any problem. Must've just been lucky. Or maybe it just went more smoothly because those decks were further apart...
Anyway, thanks for the reply. Looks like it's finally updated (even though the title of the product listing says "December 23rd" and then the order field says "in stock December 14th" LOL sheesh)