[GAMEPLAY] Shaco can kill me (as Morde) two times for the price of one

In my last game, I was playing Mordekaiser and having a jolly time when the Shaco I had just ulted used his own ult while in mine. While in my ult, his clone died the exact moment he killed me, but the weird thing was, I died two times. Yes, it registered, in both the game and in the replay, as a double kill.