Hi jagritiarora,
First off, a 100 point improvement in less than 2 months is some solid work. You understand that you have more work to do, and you've properly defined some of the things that you could have done better, so we can proceed from there. I have a few questions about these CAT results:
When you took your CATs:
1) Did you take the ENTIRE CAT (including the Essay and IR sections)?
2) Did you take them at home?
3) Did you take them at the same time of day as your Official GMAT?
4) Did you ever do ANYTHING during your CATs that you couldn't do on Test Day (pause the CAT, listen to music, etc.)?
5) Did you ever take a CAT more than once?
Do you know which Schools you plan to apply to? Each School has its own application deadlines, but most Schools have a Round 1 deadline in October, so you still have plenty of time to study, retest and make those deadlines. Even if you miss those deadlines, the Round 2 deadlines are generally in December/January, so you can always apply then.
What resources did you study with?
GMAT assassins aren't born, they're made,
Rich