People will do what is best for them, sometimes that means not telling the truth. I always find it interesting when a family gives notice and say they finally got a call from the center that they have been waiting for. Hmmmmmm news to me (not what they said in their interview!)
Kids come and kids go, it's part of the job. I quit worrying about it. I do what I do and that is it. I can't compete with a center so not even going to try.