Yes it does, it has several times. I am very careful about entering
weight and size. It has changed it both directions too. I just refunded
a buyer because he paid $70 for shipping that should've been 20. It was
listed at 2lbs calculated the buyers s...
They change mine all the time and its infuriating! They lower weights by
5xs and shrink the box dimensions by 30%. And yes, I have to pay the
difference. I took all my auctions down after catching this.