Contact the teachers. Of course you don't know whether they will respond or not, but at least you are giving them notification that he will be requesting this info come the 1st day of school.
He will also need to contact the gc. Even though we were in the same situation as you, we were able to get the GC and transcripts done during the summer. The GC has to go online and fill out info regarding the school profile.
Missing information is could be many things, but seeing as he has no info from the school for verification that what he put on his PCQ, I am betting this is where they are coming from.
I would also start working on the nom process, typically around July the MOC's release their applications, many will ask for essays, transcripts, recs., some will ask for personal recs.
We were fortunate to have a great ALO. He met with our DS every few weeks over the summer to edit his essays. I would suggest before you submit the essays, kindly ask the ALO to review it. Remember these people have seen candidates who get in and candidates who don't, they are an invaluable wealth of information. AT THE SAME TIME, REMEMBER THEY ARE VOLUNTEERS. They typically have their own 9-5 jobs and families, so don't get bent if one poster has an ALO that emails weekly and yours doesn't.
IMHO, if he did really well on the SAT, you may not want to re-take it in Oct. Our DS had 1390 out of 1600, and we felt that he was above the avg on both sections by many points it would be better for him to take the ACT only. He took the ACT and scored even higher when it was translated, thus, they took his ACT scores. To me there are sometimes it is not worth it to re-take the SAT or ACT. When you start hitting the 700 mark, chances are you have very little room for growth that it is going to make a hill of beans of difference. If you are in the 600's I could see for trying again, because you always want to be above the median, the last stats I saw publicized for the incoming class's SAT had Eng at @660, and M at @680. Use that as a form of guidance when you determine if it is worth taking it a second time. I would even say if you are at 660 and 680, and you have weaknesses in other parts of your packet you should re-take it. Remember PAR (academics) is 60% of the WCS (Whole Candidate Score), you can be Valedictorian, have 790's on every SAT section and STILL not get an appointment, because you have NO EC's or you did really poor on the CFA. You can have lettered in every sport, be class President and have 620's on both and not get in also.
The AFA is going to look at the Whole Candidate. Typically every yr on this thread there are three types of candidate posting.
1. Obsessed with PAR questions, how do I look academically?
2. Obsessed with CFA questions, will I pass with these scores?
3. Obsessed with Nom questions, I have only 1 nom, and other people have 4, will I get in?
The commonality between all 3 types, is they know that is their weakness in their application when they question a specific part of the WCS.
EC's questions are very rare, and usually is the same question, I am athletic, but have never done school sports will it still carry weight?
For example, I am a dancer or do TKD. The answer is yes, but you need to make sure your ALO and your Regional Director know how much time, effort and recognized you are in that arena. To say you dance, well great, but have you competed? If so, let them know your ranking.
People assume they look at the Athletics as a how fit you are scenario, when in reality it is much deeper than that. The AFA looks at it for proof of commitment, time management skills, team building skills, self reliance skills, ability to handle pressure, etc. All things that will be needed as a candidate. Your CFA shows how fit you are, your athletics shows you as a person in a unique manner.
We all have walked your shoes at one point or another, we are all here to help you through the process. There is no such thing as a stupid or dumb question. Even if you think it only pertains to you, one thing to realize is that there are many lurkers and many posters who might have that same question, so speak up!
I take it back, there is ONE STUPID QUESTION...will I cry when they tell me we have 90 seconds to say goodbye?