Also, I need to take issue with people being so unforgiving with the hatcheries. This is not the equivalent of ordering a book from Amazon. You are dealing with live animals that have to be hatched and delivered within a very narrow window of time. The hatcheries have to do their absolute best to have to birds they sell match what they hatch with no leftovers.
For the poster who said the OP should demand immediate replacement with the correct birds, where do you propose the hatchery find immediate replacements several days after Hatch Day? Should they keep a bunch of chicks around just to fix mixed up orders and then kill them off if they are not needed? Hatcheries are not in the business of warehousing (read: brooding) chicks, and I doubt very seriously if we could afford the prices they would need to charge if they did.
Anyway, I'm not trying to attack anyone, but you really need to understand the nature of the business, yes BUSINESS, the hatcheries are engaged in, and the dynamics of timing and human error that are involved. Waiting 2 months for a sizable order of one of the most popular breeds is not unreasonable, especially since the OP got birds that would qualify as a substitute for Buff Orps for nearly any planned use other than showing.