I agree with BOCOD and nickUSN, your Admin O gave you horrible information. If you wanted pilot, you should have applied for it unless you couldn't qualify (ie: age, eyesight, physical, etc.). That's pretty messed up that an O in your squad would discourage you from pursuing what you want.
I wouldn't expect to get orders ahead of anyone else based on already being accepted to your school. I went through in Feb. with the first group and I had already been attending the University I wanted to go to. Other people in our class were changing schools while they were there at NSI and had little or no prior college, so it doesn't seem to matter much. I'm not sure what the criteria is for selecting when you'll go to NSI except that if they want to send you to BOOST first, you won't be in the first group of NSI.