Movement order and fortifications

[Vynd]

I agree with you on 2 and 3. Yes, what you've described is what will happen. For number 1, though, I think you're mistaken. Breaking a siege is treated like moving into enemy territory. So if the besieger is trying to move out into a friendly province, he should definitely move first, during the friendly movement phase. And if the besieger is moving into an enemy province, he will still move simultaneously with the people trying to break the siege. Which probably means that it will be just like trying to pin down an enemy army that is moving from one province to another: you can't do it unless you are moving from the province they are trying to move to. It could be that the army trying to break siege cause one of these "armies trying to move past each other" checks, but my guess is they do not.