I'm not one to often stand up for USPS, they are a sub standard postal services when compared to other nations globally, however this is simply an accident that can happen. These parcels are processed using high speed optical character readers and bar code scanners. The machinery is monolithic in proportion and running at insane speeds. I've seen it happen on the modern equipment before (although not to this level) so the older parcel sorting equipmentused in many USPS facilities could easily mangle a rock, let alone a box full of tobacco. Chalk this one up to poop happens and be glad P&C is standing up for customer service.