Don't know if anyone else has this problem. Occasionally when I'm selling multiples of the same item, the list of items will shift before I'm done and I may accidentally sell an item I didn't intend to. I will explain. Let's say I have 5 Hide Helmets. Right below them in my inventory is a Hide Shield which is equipped on me. I usually click through my items I'm selling pretty quick if I know I have more than 1. But sometimes before the stack is finished, it shifts to the item below it. If I'm not careful, I accidentally sell something I don't want to. Now, I tend to pay more attention when selling and don't click rapidly through a stack. Anyone else have this? Not even sure if it's a bug or not, just wanted to point it out.

It sometimes happens to me too. I don't know why though. I use the enter key, so it's not because I accidentally select (click on) the wrong item.