Hi TheNightKing,
You mentioned that this CAT was the first Official CAT that you've taken - but have you taken any OTHER CATs/mocks during your studies? Since you're planning to take the Official GMAT in September, you should plan on taking FULL-LENGTH CATs at regular intervals and in a realistic fashion (re: take the FULL CAT - with the Essay and IR sections, take it away from your home, at the same time of day as when you'll take the Official GMAT, etc.).
Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) How have you scored on EACH of your CATs/mocks (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your goal score?
5) When is your exact Test Date?
6) When are you planning to apply to Business School?
7) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich