On our server, we recently installed Chest Commands GUI. We have got it working, but there is an issue in the buy/sell section - Once you buy something, if you are fast enough, you can get another one of the item for free. We fixed that by having the inventory close straight after you bought something. However that is not ideal, and also, with the divider between buy/sell which is shown by glass panes, you can get free glass panes. Basically they can make copies of anything in the menu. Can anyone help? Thanks.
