I've noticed that the deployment properties for all my packages and applications apart for SUP packages cant be changed. I found a TechNet article saying "You cannot change the action of a deployment after it has been created.", however we have called Microsoft PSS just to confirm the reasoning behind this and they say that you should be able to change this setting. Is the TechNet article correct or PSS :)
We have checked 4 sites and all the sites behave the same.