Hi anissa57,
Score progression on practice CATs/mocks is rarely linear - and the
MGMAT CATs are generally regarded as being a bit tougher than the Official GMAT (meaning that a drop on this 2nd CAT isn't necessarily a 'bad' thing). In addition, many GMATers spend 3 months (or more) of consistent study time before they hit their 'peak' scores, so you should not expect to have mastered any of the content or Tactics just yet. There are also a variety of external factors that can impact your performance (such as the time of day that you start the Exam, how well-rested you are, the environment, etc.), so you have to consider the circumstances under which YOU best perform.
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) What type of study routine have you been following? How many hours do you typically study each week?
2) 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:
3) What is your overall goal score?
4) 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