I agree that an order is presumed to be valid, but that only holds true if there is no evidence to the contrary. The whole point of these court actions are to validate those orders since there appears to be evidence to the contrary.
If you blindly follow an order when you have credible evidence indicating that the order is invalid for whatever reason then you can be guilty of a multitude of crimes. There appears to be credible evidence that Obama, thus his orders, are invalid. If true, then the service member has an obligation to question the order.
I agree that if an order is questioned solely because you disagree with the ideology of the person giving the order or with the order itself, then you are insubordinate. However, with the Obama eligibility issue, that does not appear to be the case. It is all about good faith and credible evidence, which is why this rightly needs to be sorted out in court.
The whole point of asking to see the birth certificate is that it has NOT been seen. Therefore, there is no evidence that Obama is NOT elibible. He is duly elected, sworn in, and holding office.
He signs things every day.
By custom of service, he is the Potus until he isn’t.