I posted this on the potty training board but that place isn't really hoppin.
DD will be 3 1/2 next month. She has been potty trained during the day for the last 8-9 months. She had no issues with it and picked it up really fast.
However she hasn't had the same success at night. I take her every 2 hours and she still has accidents. We put her in pull ups and she will refuse to go on the toilet and wait until we put those back on. If she has to poop she will go to the toilet to do that.
Other then getting up every hour to take her I'm at a loss on what to do to help her stay dry during the night.
Re: Potty training question.
Jordan still wears night time underwear every once in a while. He will go a week straight without wetting the bed and then he will go 2-3 nights where he will wet the bed. I talked to his DR and she was not concerned.
It definitely is a developmental milestone! Sounds like you are doing everything correct!