I'm confused so perhaps I'm misunderstanding something. Even if Miele somehow controlled the maids, Aria was still the person that ordered (or even personally carried out) all those acts against Miele. I can accept that both of them are simply bad people that hate each other for whatever reason but the way it's framed, it's not as though Aria is angry at Miele post-time travel because of some injustice but rather because she outsmarted her. But now she gets to go back in time to "solve the mystery" after having the true culprit spoiled?