Yes, that’s true but he can always request a copy after six months. Maybe the copy would show “Honorable”.
I’m not sure. I suspect that with sufficient appeals his character of service will be upgraded. From what I understand, except for this lapse of good judgement concerning his postings on the President, his oveall service in the Marines was good.
I suspect he has several years ahead of appeals and requests for change to his military record. All in all, not worth it.