If I try to teach Nebo too many different things at once, he gets confused also. Like, I taught him "speak" one day, then taught him "up" (put his paws on my chest) the next....so then every time I asked him to "speak" he'd bark AND jump on me..lol

So what I do now is teach one thing, and wait about a week before I teach another. I'd just keep practicing one command until he has it down again, and then move on.