as always sound advice from jenny, thanks. NASS acceptance and candidate numbers are separate letters, most correspondance will be.
I'll add this to the process advice. Although you don't need to get the applications in early, don't wait to start getting things together, print out the applications, SA's, MOC's (when they become available), talk to your teachers before the summer break about your intentions (they're difficult to contact in the middle of summer), notify your BGO (although they are likely to tell you to wait until your application process is well under way). Start talking to the people around you, family and friends. Their support along this journey will be invaluable as time goes on.
Fill out the applications in pencil. Write any required essays or letters early. Put them down, live life, re-read your essays and ask yourself if it's what you want to say or thought you needed to say. Is this what I want people to think of me? Have someone else read it and honestly critique it. Will the other letters of recommendation reflect what I've written here? This self reflection process is not an easy or quick one. This summer won't be like last summer (or next summer if all goes to plan). It will feel like work.
I've read a few posts about the applicant that couldn't go to the doctors appointment, or to an SA forum, or to CVW because of their field hockey, or track meet, or football game "'cause the coach doesn't allow that". Think long and hard about your priorities. Are you willing to sit on the side lines for the next game because you missed the last game for this chance of a life time? My advice is to follow your own priorities and decide what's important. That single event won't get you in either, but may speak to your priorities in life.
As I researched the requirements of the application process (as clearly as they are all outlined) my head nearly popped until I made a list of the various things itemized that needed to get done, the order they needed to get done, the timing of them, and checked them off as they got done. This is only the mechanics of it. But it may help to ensure things are getting done when they need to get done. But don't wait for deadlines. There's a saying that applies here, "If you're early you're on time; if you're on time you're late; and if you're late, you're forgotten". It doesn't help to be too early though.
The candidate must be strengthening their applications as they go, your standing as a junior only got you noticed, it won't get you in. As has been said before keep taking the various tests, study more, continue or join school clubs of interest. Try out for school athletic teams if you are not already involved (although it's better to have an established sports record [not records] it's not essential. What's important is to stretch and reach for higher goals, not more goals (ie, it's been said that too many short term extracurricular is not as strong as having something you like and have pursued for a number of years). But stretching your interests and abilities, demonstrating the commitment to community service, service to others, is critical.
The application process is an ongoing and continued process. It will last a while. Which part gets higher "scores"? None of them, some of them, all of them. There are, or rumored to be, percentage point for the whole person score, but I think is may be distracting to put too much emphasis on trying to hit those marks. It's not you and it will show. The process is designed to reveal you, the real you. Make your application the best it can be for you.