Hi makky2000,
To start, if you're interested in some advice for this next phase of your studies, you would likely find it beneficial to start your own post-thread (instead of piggy-backing on this old one). When these types of score drops occur (between your CAT/mock Scores and your Official GMAT), the two likely "causes" involve either something that was unrealistic during practice or something that was surprising (or not accounted for) on Test Day. Before we discuss any of those potential issues though, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) When did you take the Official GMAT and what were your Quant and Verbal Scaled Scores?
2) How long have you studied in total? How many hours do you typically study each week?
3) What study materials have you used so far?
4) On what dates (or approximate dates) did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
5) What is your overall goal score?
6) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich