Hi honkgirl07,
Approximately 2 months ago, you posted that you had scored a 700 on your initial practice CAT/mock (without much, if any, study). Is there a particular reason why you think you might suddenly score 600?
Business Schools generally do not care if you take the Official GMAT more than once, so accepting this upcoming Score is probably fine regardless of how you actually Score (and you can always cancel it in the short term if you have any concerns about it.
If you are ultimately unhappy with this Official Score, then before I can offer you any advice for this next phase of 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 followed over the last 2 months? How many hours did you typically study each week?
2) What study materials have you used so far? What “brands” of CATs/mocks have you used?
3) 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:
4) Is your overall goal score still 730+?
5) 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