Thank you.krischan said:They are just joking because you took the incident so seriously. They had their fun now with you not remarking it. Strange things happen from time to time. No damage was done. Drop one of the items or place it on your "freak items" mule and you are through with it.
Back in 1.09, I once accidentally duped Tal's armor by muling in a game which was bugged in some way. I used the armor to test what exactly happens if you bring two dupes of the same origin into the same game. The result was that one remains, the other one gets deleted.