Got to play with an un-owned skin today...

Played a normal as Xin (who I just bought this week) with a buddy of mine today. I noticed that his hair was silver and his outfit had some blue in it. Wasn't sure if I was missing something or if it was a glitch, but I asked my buddy and he saw it too. I was pretty sure I didn't own the skin regarding I had just bought Xin, but I double-checked just to make sure. Really hope I don't get penalized for this since I have no idea how it happened.