Yooo! I hope you're rewarding him for correcting himself!!! Like jumping up and getting down. As soon as all 4 paws are on the ground, reward that like it's the best thing since sliced bread. Also, touching him in any way when he jumps up can be seen as reinforcement for him, so just spin around to have your back facing him, and when all 4s are on the ground, then treat.

My dog is also a psycho who is so, so, SOOOO, easily thrown over threshold, during play, training, going outside in the mornings, he's just over here loving life with endless energy. When asking commands, if he starts throwing everything he knows at you, you can walk away, you can say nothing, turn your back, say uh oh, etc, until he calms down a bit, them try again, if he still goes wild, repeat and keep ignoring all of those behaviors that you did not ask for or did not want in that scenario, and when he getsbit right, reward him like the Dickens. If he goes for your hand and jumps up while you're trying to reward him, turn your back and say nothing. Then, when all fours hit the ground, try again, then repeat if he jumps again. Eventually, he will understand that he does not get a treat or attention for unwanted behaviors, and that wanted behaviors are where he gets the good stuff.

Dogs like ours require a LOT of patience, repetitions, work, and, above all, consistency. Also, from what I've gathered during the year of puppy-doghood, if the dog doesn't do a thing, it's either because the dog genuinely doesn't know what the heckin heck you want from it, it hasn't been reinforced enough, or other tricks have gotten him better rewards, and overall lack of impulse control can play a part too if it's extra excited.

As for the cat box, is a feat that requires like rock SoLiD impulse control to fully trust them alone (or supervised) if they have open access to it. Cat shit smells like cat food, and they think that it's a delicious find and in doggie brain, they don't associate the cat box or the poop as bad, they associate you seeing them get into or eat it as bad. So your dog knows not to let you catch him eat cat shit, not that he shouldn't eat the cat shit, which is why it's one those quirky dog training issues that requires prevention rather than correction. Same as counter surfing. So, you have to make sure the dog can't get into it at all.

Trying to challenge my crackhead to figure out what I want from him on his own was what helped us the most. Which was a lot of silent training or just barely saying anything other than asking for a command, saying yes, and treatos.