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I don't really understand your question, it seems pretty autistic, but just in case English isn't your first language or something and you just don't know how to phrase it right, the first three JoJo's look pretty similar, maybe this is more obvious in the OP's of the anime, so if it looks like Jonathan, you're probably just mistaking it for Joseph. Unless you're talking about when they show Jonathan and Joseph in the third OP? That's just to show past characters, but even then your question doesn't make sense.