With respect to the qualification of the domestic relations order, it is a discussion of what is right and wrong and a discussion of what is practical and what is not. It is so impractical to disqualify for the reason you suggest that it is wrong legally as well. A very recent court case likened the qualificatiion process as going through a checklist. I think it was an oversimplification, but the court made the point that if all items for qualification were properly in the order and no items in the order were forbidden by the applicable rules, the plan administrator should determine the order to be qualified. Can you point to anything in section 414(p) that suggests that if the order does not specify the name of the plan administrator correctly that it fails to qualify?
I am sorry to say that because the other players are ignorant and the court does not care, you will probably get away with disqualification and another order will have to be issued, causing additional delay and expense.
By the way, since you are neither a lawyer nor a fiduciary, how is it that you are determining or advising about whether or not a domestic relations order is qualified?