Trading Champion Glitch.

So me and my friend decided to duo up. I got first pick and he was second in ranked. He told me to go Vi and I told him to go Diana so we could trade. I equipped on my AP runes and masteries and waited until we could trade. Little did I know, it wasn't going to let me and him trade. Right when everyone was locked in it automatically started the game. So I was AP Vi top and my friend was AD Diana JG. We obviously lost... We basically had no chance whatsoever, not to mention Orianna went like 1-14. Safe lyfe... :(