You know, from my observation of children who I know, potty training is not really a linear business but more of a "few steps forward, couple steps back, few steps forward" type of thing. What you just described is fairly typical, I believe, to judge from what I've heard from ds's friends' mothers and friends of mine. Ds turned 3 in April, and by September was potty trained to the point where I felt we could finally say "He's potty trained" and even then there'd be the occasional night he wouldn't stay dry. It's hard not to get your hopes raised when two weeks go by and she's used the potty consistently and then goes back, but I really do think you'll get a lot of posts saying "my kid did this and eventually went back to only the potty".