Is using one "Go Potty" command confusing to a dog?

Repeating the command to her while she's not doing anything won't help her. Once she does poo, she won't ociate the command with her action since you had been chanting it to her for however long you had been wanting her to poo. The best thing to do is to just wait until she actually does poo, then say "get busy" or whatever you want and then praise her. A LOT. That way she can actually ociate her pooing with the command "get busy". Hope this helps!