Hi jaykim0507,
First off, a 660/Q49 is a solid score (it's just above the 80th percentile overall) and it might be enough to get you into Business School.
GMAC has publicly stated that the Official Score that you earn on Test Day is within +-30 points of actual ability. Assuming a similar 'swing' in how practice CATs function, all of your scores are within range of about 690-700 (your Official Score is at the 'low end' of the range).
Since you're putting a lot of emphasis on your practice CAT scores, I have some questions about those Tests...
When you took each CAT...
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 do ANYTHING during this CAT that you couldn't do on Test Day (pause the CAT, listen to music, etc.)?
5) Did you take them more than once?
When are you planning to apply to Business School?
Do you know which Schools you plan to apply to?
GMAT assassins aren't born, they're made,
Rich