Joe, personally I would not be too happy. They should have disclosed that the number would be sanded off and have other markings on the box. I doubt you got fakes/seconds, as I believe BCP is fully legitimate, but they should have notified you when you ordered. When I buy cigars, I want them in the original packaging from the manufacturer.
However, if you plan on smoking them, then you got a good deal. Let BCP know your concerns and enjoy them!