Sigh sorry to hear that Skysue. That really sucks. You just can never trust a parent with plans that far ahead. Especially never trust a parent who answers vaguely about future plans.

Don't hate but I was actually once in a situation where my daycare provider was asking me about what school I was enrolling my son in and offering to drive one way etc. I kept answering her very vaguely because I was sure that by Sept I wouldn't be able to afford to send my children to daycare. At that time I was doing my own business and it was losing money and I was trying to think of a way to tell my wonderful provider the bad news but I couldn't for a few months because I felt so bad for her. I always remember how I felt as a parent and how guilty/torn I felt because she was awesome but I just couldn't bring myself to say it for months at a time.

Eventually I told her - we both cried and hugged for a long time and we moved on positively and I eventually opened my own daycare a couple of years later. Now I know that parents can sometimes change their mind when it comes to someone starting JK or what happens 6 months down the road and I remind myself that parents (just like me) occasionally have to do tough decisions that work best for them.

If I was you, I would make my own arrangements, interview etc and if she changes her mind then it is too bad. She can't expect you to wait around for her to make up her mind.
It pretty much sounds like she is gone anyways and just doesn't want to make the final cut yet in case her plans fall through.
Good luck