duplicated shovel

was using anvil and trying to make eff 5 and 1st set scred up so i tried differnt shovel.. i got the new enchanted one and both the old ones back
dont know exactly how i did it

 

i was able to give shovels to omni crafter and he verified he had 3 shovels

 

i can try but i wasnt paying a ton of attention..
i was doing alot of anvils and i was just like wtf during the one