Hi dheerajb,
A 570 is a strong 'baseline' score (the average on the Official GMAT hovers around 540-550 most years).
The number of correct answers is not the only/biggest factor in what determines a Scaled Score. Since you're using the GMAC software, I'm going to assume that the score is accurate - and based on what you described, we're likely talking about one of the 'rarer' ways to score a Q47. This does NOT mean that you need only 21 correct answers to get a Q47 though.
I would strongly recommend that you NOT take your next CAT tomorrow. You would be better served putting in some practice time between CATs, so taking your next CAT in 2-3 weeks is the better option.
GMAT assassins aren't born, they're made,
Rich