Hmm.. have you unlocked arena teams? You might have to remove her from those also - I suspect once you unlock the arena, it sets all your teams to whatever you had at the time you unlock it.Yeah, I appreciate it, I'm just having difficulties turning one of my Kryla's into a prisim for some reason... it won't tell me why, it's just not happening... maybe I need something? I took her off all my teams, and unlocked her, but she won't be selectable...
/edit: Should be more helpful - to get to arena teams, you would click the red thing at the top when you're in the units view where you pick your team.