Reaper Soraka Bug

So i played a teambuilder game as support Soraka with the Reaper skin. After the game was done I entered a ranked game. First pick guy picked Soraka for me, I had last pick and picked Jinx for him. We traded, I made sure that Reaper skin was still selected. While it was there, didn't press anything, the game started. At the load screen it showed Divine Soraka. Sure enough it somehow picked Divine Soraka skin for me when the game started.