Are these rules posted or written anywhere? I like to have all the rules printed out to go with the game, if that's possible, for reference.
The proble here is that if Yuri had come with his two cards and the usual advantage card, no one would have any doubt about the second card being a part of him. But he only came with his second part, so people got confused.
I don't think there's any need of a rule to explain that some characters have more than one card in order to have the enough space to write all their abilities.
I'm a little bit worried about Team cards in general and Yuri in particular - they seem very highly powered for their cost. I'm kind of afraid Anima Tactics is starting to show signs of "Heroclix syndrome" - the new figures look far more powerful, for their cost, than the older ones.
Think about it twice. First, team cards are a way to award players for building a fluffy list. In order to acquire a team card you must add to your list all the characters that form the team, thus your list loses flexibility and becomes previsible. In order to make up for this loss team cards were created. Think about it, with all the character options currently available I doubt some team characters would be seen usually in lists if team cards didn't exist. So team cards are a great way to encourage players to keep their lists fluffy and playable.
About Yuri, Cadfan has pronounced about him already and I agree. Yuri is a leader, this limits him as a choice because he can be played only at 300+ levels and it gives extra victory points to your adversary if he/she manages to injury or kill him. Given such disaventadges he hardly would be played if he was like a normal character. That's why he seems more powerful for his value cost.
Truth said, I think the Anima Tactics overcomes quite well with that given troubles. Team cards and leader design provide ellegant and interesting solutions to "not so evident at first sight" gameplay balance issues, thus showing that Anima Tactics is a well thought game sistem which keeps pretty balanced.
About new miniatures being far more poweful than older ones for their cost... I disagree. Proof is that despite the new characters, people keeps playing characters like Sophia, Faust, Dereck, Harod, Ayl, Chesire, Kronen. Even low cost characters like Lin Pao and Akio are still interesting choices for what they do.