I'd say give it some time; give her a chance to figure things out. She may be in over her head, but she'll have to figure that out.
I would ask her to reschedule instead of canceling. And I would ask for her to give you a free session if she has to cancel last minute. You are giving up your time to be there, just like she is. Unless of course she doesn't charge for missed session.
I bet she has this stuff figured out within a month. It must be hard to go from seeing clients all the time to doing management.