And who is to say that the box is the right size? I know of someone many moons ago, bought a Bosscat, totaly standard kit, kit wheels, Schumacher tyres etc, and it didn't fit in our region's box, so he got a metal bar made to the BRCA width, tries it in the box, guess what? the box was too small
maybe the same thing is happing now, lets face it, the boxes are probably pretty old by now, things get knocked about a bit over time.