Bug Report - Nasus

[GAMEPLAY] Nasus - When I was playing Nasus, I selected the Archduke Nasus skin, which I own. However, when I was loading in and when I got in game, it had me using the Dreadknight Nasus Plague skin, which I do not own. I cannot guarentee if this will happen again, for this is the first time it has happened. An Amumu on my team also claimed that he had equiped the Pharaoh Amumu skin, which he said he owned, but he had the Classic skin in loading and in game. I just wanted to let you guys know about this bug (or maybe easter egg? I can never tell). :)