We found a Dupe

we were playing in a 2 man party with short loot allocation, when clicking a container 4 items dropped, 2 of them white indicating that i can pick them up, 2 of the grayed out indicating that my party member only can pick them up,
when i picked my 2 items up it put 4 items in my inventory so i got 100% of the loot dropped, my friend still saw 2 items on the ground and was able to pick them up, the items were identicaly to the 2 items the loot allocation had allocated to him making it effective dupes