While I was trying to change to position of my Arcanine with my Regice, the game somehow moved my Regice to the box and made a duplicate of the Arcanine. The two Arcanine will level up differently depending on how much I use them(like any other Pokemon), yet it doesn't show up that I have the second one if you look at my page... Does anyone think they know what caused the problem.. Or has this happened to anyone before?

same thing happened to me its just a bug the way to fix it is to log out and then log back on. :)

I found out how to fix it, i just cleared my team and re-added them.. hahah ^_^, thanks though c: