11 wks is still pup stage but the corrections must be given. have you tried to intervene when the rough housing starts? if you must put a physical barrier (yourself) and not only stand your ground but back her up as to claim space. you should instigate play and end it also, don't let her dictate anything.
firm command or physical presence to show her that you are there and you are the boss.
My dog had a knack to shoot down the stairs but i never follow him so he comes back and waits for me to to take the first 2 steps down the stairs then he follows me. don't give in to aww that's cute let them play, this is a sign of ignorance when it comes to dog behavior.
grabbing your dog to correct them is a NO NO. if your dog can't behave with the other dog have a leash handy and remove her from the spot.
Of all the creatures, man is the most detestable. Of the entire brood, he is the only one that possesses malice. He is the only creature that inflicts pain for sport, knowing it to be pain. The fact that man knows right from wrong proves his intellectual superiority to the other creatures; but the fact that he can do wrong proves his moral inferiority to any creature that cannot.
euthaniztion should not be limited to dogs.