Your best bet is to just stay hired by the company with a good attendance record and performance record, etc. and then go to auditions on Saturday mornings (really as many as you like) and transfer from there.
But if entertainment really wants you, they'll have you no matter what.
Although it's really better not to push your luck. There could be someone in the audition who's just as good as you, but has no other issues with the company.
High school graduation was more important to me than working Disneyland even though I loved it. There's no reason to work people 12 hour shifts 5 days a week when there are so many people there to work.
I must say you made the right choice EagleWings. there is nothing more importanat then your education right now. Don't sacrifice your education for a $8.00 (sorry $8.25) / hour job.
You will have plenty of time when you will have to work when you get out of HS. I'm glad you enjoyed being a CM while you were there. Maybe in a few months, once school is out, you can go back if you want.
But as you have seen, maybe working at DL while going to school (I mean college too) isn't the best idea right now...