at 1:15 p.m. (Jan,10,2017) i was selling 2 stacks of batbombs . first attempt i tried to sell each for 250k, they did not sell and were returned to me. During this time i mined smooth stone on my island. When i recieved the items back i again tried to sell each of them for 250k and then i continued to mine more. They did not sell again and were returned to me. This time i attempted to sell them again at 150k each. I then went back to mining mnore - got one immortal stone (yay). The batbombs failed to sell again and they were returned to me so i put them into a chest convinced that they would not sell. Next i typed /ah v just to see what was in the AH and low and behold the batbombs were in my drop box waiting for me to take them back. I took them and placed them in the chest. I then announced in public chat that they were duplicated. Simply to make notification of the event. During all of this i never left my island, and did not leave the vacinity of the smooth stone gen. I did nothing out of the ordinary, and i could not repeat the duplication - I tried for science to help you guys. This is the third time i have had item duplication in the AH, and i don't see a commanility between them, except that i was mining smooth stone each time. not sure how that changes anything, but it is the only common factor i have noticed. The items didn't duplicate until i removed them from my inventory and placed them in a chest. Sry Turq , i wish i could give you the details you need - but it happens so suddenly and randomly that i am not prepared for it, and thusly do not have the information you need. *still feel it is worth reporting to you. sincerely Hallideadly.