You would think AMAZON.COM of all the websites on the planet would have the redundancy in place to prevent this sort of thing. Unreal timing, as mentioned.
RE: Amazon and Box Condition - Basically the only negative feedbacks I've ever gotten were for minor box damage on items listed as new, and who knows if that's from me missing something or from the Amazon shipping process. Personally, if I am selling something at a collectible premium, I try to make sure the box is also premium. I simply ask myself, "If I spent $300 on this $100 set, would I be annoyed if the box came like this?". YMMV, apparently. I play it super safe, and I try to minimize returns if at all possible. Non-LEGO stuff (ala collectible action figures, Funko Pop type stuff) people are super super ornery about box condition, even stuff moving around in the package in things like Marvel Legends.