This is a rare bug. Apparently, if you hold down the 'down' arrow key in a shop in your inv, the slider will scroll all the way down but the items in the pane don't refresh to the items in the bottom of your pile. But repeating the same for the 'up' arrow key works fine. And everything works fine as well in startington. Bug reproducible only in shops. Now, try to say the thread title really fast 25 times in a row...
