Hi Anurag,
The 'accuracy' of a CAT score is based heavily on how realistically YOU choose to make the CAT-taking process. If you skip sections, pause the Test, take it at home, take it at a different time of day as your Official GMAT, do anything else that is unrealistic, etc., then your score is likely to be less accurate.
1) What were the Quant and Verbal Scaled Scores on each of these CATs?
2) Did you take the FULL CAT each time (including the Essay and IR sections)?
3) What is your goal score?
4) When are you planning to take the GMAT?
GMAT assassins aren't born, they're made,
Rich