You have your work cut out with two pups from the same litter, when you train em make sure you keep them totally seperate from each other and better still do it on your own with no other people especially kids present, keep the training sessions short make it a game and always give the pup plenty of praise, I think at nine weeks you are expecting too much, personally I think if you are intending to work the dogs I would let one go and concentrate on one for now, if there just pets stick with it.