So basically, what happened was Rinoa caught Seifer and Squall in bed together and her hair turned white from the horror. She then decided to get plastic surgery to look completely different and somehow, the theory of not being able to be 2 yous in one place at the same time, is irrelevant, but since it's just a theory anyways, I suppose it doesn't matter. I don't know, I see no proof behind this theory but am inclined to believe it because it's interesting.