Hi Jevish,
From what you've described, only your first CAT was close to 700 (all of the others were right around 600), so it's still not clear why you were expecting a 710 on the GMAT. I have a few questions about how you took your CATs:
1) Did you take the ENTIRE CAT each (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, skip sections, take longer breaks, etc.)?
5) Did you ever take a CAT more than once?
Before I can offer any suggestions for your studies, I need to know what study resources you have used so far.
GMAT assassins aren't born, they're made,
Rich