Hi there. Just would like to report a pretty serious bug. Seems that shop signs that buy, sell or buy/sell either Pistons or Sticky Pistons, are not working properly. The ones that sell only seem to always give an "out of stock" message, even when the chest has them. The buy/sell signs will sell you the item, but when trying to sell back to the shop, it gives either a "Chest is full" or a " You don't have enough items to sell" message....clearing not being true. These signs have already been tested on smp1 on several residences, facing north, south, east and west, with different people....and all came back with the same results as stated above.Please try to tend to this matter as soon as possible. Thank you!