That's how I train with my CaLi...I say "go potty" for both..when we walk I say 'go potty' and she'll pee, then I have to tell her again 'go potty' to remind her to get the second half of the job done...hahaha.
CaLi seems to do the same thing with the pad. She will pee on it in her Graco playpen No Prob at all....but going poo, ugh!!!! She will go behind a chair on the bed, the ottoman, kitchen anywhere she can be alone when youre not looking. Only two or three times I've had her actually poo on the pad...and that was after whining like she was dying.
I'm curious as to how to fix this irritating problem. Thanks for posting it as I will wait for a response as well. Just know you're not alone