Hi Nis20,
To start, a CAT is really a 'measuring device' - when used correctly, it will give you a realistic score and help define your strengths and weaknesses, but it will NOT help you to fix any of those weaknesses. To raise your scores, you have to learn the necessary Tactics and put in the proper practice and repetitions. The CAT will show you whether your studies are helping you to improve or not. In addition, the process of taking (and reviewing) a CAT requires a significant amount of energy and effort - and takes time to 'recover' from. This is one of the reasons why you typically shouldn't take more than 1 CAT per week - and your last CAT should be taken about 1 week before Test Day. Going forward, you really shouldn't take more than 1 FULL CAT per week.
Based on your last 2 CAT results, assuming that you took those Tests in a realistic fashion that matches up with how you will take your Official GMAT, your current 'ability level' seems to be around a 600. In a prior post, you stated your Goal Score was 700+, but increasing a 600 to a 700 in just 16 days is likely too difficult to be considered realistic. From your posting history, you appear to have been studying for about 1.5 months - but many GMATers spend 3 months (or more) of consistent study time before they hit their 'peak' scores. There's no harm in taking the GMAT in approximately 2 weeks, but if you're going to keep studying until you hit 700+, then you will almost certainly need far more training time (and you can potentially save some time, money and frustration by pushing back this Test Date).
1) Are you planning to take the At-home GMAT or are you planning to take your GMAT at a Test Facility?
2) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich