I sometimes sell in sets of glasses and up until now the calculator was pretty good about increasing the cost and charging the correct amount for shipping. For example 2 sets of 4 glasses. But this listing is not increasing (same cost to buyer for one or two sets):
https://www.ebay.ca/itm/401096810667
I sold 2 sets to someone in the U.S. recently. Calculator only charged buyer about $35 and it cost me $55. I thought I had just entered the wrong info but made sure I would check my listings and found this. Now I wonder if the same thing happened there.
