Well, that's what the law TELLS her to do. Problem is that there's no one who runs around telling the insurerrs & banks & such not to make changes. She'll get in trouble if she takes you off her insurance, if you tell the judge that you want her to get in trouble for it, if you know that you've been taken off. What KIND of trouble is up to the judge. But by that time, yo'ure uninsured, and so ... well, it's just not that injunction that provides the most protection on this... it's the COBRA that will be your saving grace if you want ot make certain you stay on the insurance.
That injunction that's supposed to keep her from changing the insurances & such is only worth as much as the paper it's written on, if she decides not to follow it & you don't catch the problem before you need insurance! Kind of like getting an order of protection against violence... if someone is REALLY violent, a silly little order of protection isn't really going to protect his intended victim.