Labradoodle & Goldendoodle Forum
At this point I'm assuming Stanton is still getting treats as a reward for his response to your commands/cues. I would try giving him a command (without the treat readily visible) and if he responds correctly then give him a treat. Later try a different command and do the same. If he does the WRONG thing then just walk away, no treat and try a few minutes later.
You also may want to spend a couple minutes at a time working on just ONE thing a few times. Then a different thing. Just to separate them in his mind. When he seems to be getting it again you can try to do a few things in a row again. Just be sure it's clear to Stanton when he's wrong he doesn't get a treat. Once he's unconfused again you can gradually wean off of the treats and only reward sometimes with treats, but use praise the rest of the time.
Stuff like this has to do with stimulus control (if you google "stimulus control dog training") you'll find some articles on it. He has learned that pawing gets him treats (or did at one time) and attention and rewards and he likes that so he tries to create the situation by pawing (both out of habit and probably out of desire for the reward). He has to learn that the reward only comes when he responds to the right stimulus ("Bruno shake a paw" -- or whatever your cue word or phrase is) and there is NO reward if he does it of his own accord.
You'll have to make a concerted effort to NOT reward him for pawing he does when you don't give him the 'cue' to 'shake'. Actively and obviously ignore him by getting up and leaving him there. Don't reward with attention, treats, voice, or anything UNLESS you've asked him to shake. When trying to extinguish a behavior, at first it will get worse. Until he gives up on the idea that pawing works. Then if you still want him to do the 'shake a paw' trick you'll have to be very careful to ONLY reward with attention/treats/whatever when you've asked him to do it and try to not have the treat visible so he doesn't try to get it from you by offering his paw.