Hi src_saurav,
To best understand your situation, I really need specific answers to the questions I asked:
When you scored 600, 570, etc., what were the Quant and Verbal Scaled Scores on EACH of those individual CATs (eg. 600/Q47/V26)? I want to track how your scores changed over the course of your studies.
When you say 'full cat MINUS that', does that mean that you did NOT do the Essay and IR sections? If that's the case, then you did NOT take the FULL CAT.
Considering your goal score, these CAT scores and assuming that you have NOT been taking the FULL CAT each time, you are going to need to invest some serious time and energy to raise your GMAT score to the desired level. You're also likely going to need to invest in some new GMAT resources. I would suspect that at least another 2 months of consistent study will be required. So a late September Test Date might be doable, but an October Test Date might be the reality.
GMAT assassins aren't born, they're made,
Rich