Hi tejyr,
The process of taking (and reviewing) a CAT requires a significant amount of energy and effort - and takes time to 'recover' from. This is one of the reasons why you typically shouldn't take more than 1 CAT per week - and your last CAT should be taken about 1 week before Test Day. From what you described, it sounds like you took 4 CATs in one week. Is that the case? By taking so many CATs in such a short period of time, it's likely that you were too tired to perform at your best after you took the first one of that group. It's also worth noting that we don't know how accurate that first CAT result actually was - but that's a different issue.
Before I can offer you the specific advice that you’re looking for, 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 (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) When are you planning to apply to Business School?
5) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich