Just something that bothered me. The actress who plays young Dorothy has brown eyes and the one that portrays her older self has blue ones. I don't think anyone created a topic about this or mentionted that. Can a person's (even in a fantasy show) eye colour just change for no reason?
Young Dorothy and Adult Dorothy seem like different people to me, both by looks and personality. Are they even the same person?
They are the same character. Sometimes you can't get actors to match physically perfectly. It's a bit sloppy, but almost every show and movie winds up doing it at one point or another. Overall, Once is actually a lot better at matching different ages of the same character than a lot of other shows though.