I preordered Batman: Arkham City on walmart.com so I can get Arkham Asylum for free. When I got home on tuesday there were 2 packages at my door. Inside the first package was Arkham city, with Arkham asylum. Inside the second package was the exact same thing. I inspected the invoices in each package and they were both the same. I was not charged twice. I guess it must have been my lucky day. Has anybody else experienced this error or am I the only one?