[solved]Glitch? :c

I have two teenagers and two children. They all got into private school and then I downloaded a uniform that changes the teenage default uniform. My younger teenager wont go to school, she's only just become a teenager so its not because she's only got 7 days until she becomes an adult. The older teenager dresses in her new uniform and goes to school just fine. It comes up on the younger one that she's going to school after everything that comes up, but once she's done doing that, the square thing up the top for school just fades away.
I can't get her to get on the bus, or drive or walk :/
Can anyone help?

Oh and she still has her A+