Hi gugygugugygy,
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 your CATs function, most of your CAT score results - along with your 2 Official Scores - show that you essentially performed the same each time (about 700 +/- a few points). You handle certain aspects of the GMAT consistently well, but you also make certain consistent mistakes. From what you describe, those various scores go back over the course of almost a year, so it's possible that you have developed some 'bad habits' during your studies that are keeping you from scoring higher.
A 710/Q49 is an outstanding Score, so if you are rejected from a particular Program, it is probably NOT because of your GMAT Score. By extension, you may have made some type of inadvertent 'mistake' in your application (such as an ineffective essay, some type of mistake during an interview, etc.). Thus, consulting with an Admissions Expert might help to define what you should spend your time on going forward.
If you're certain that you want to retest, and that you want your best possible shot at a 750+, then the Enhanced Score Report for your 2nd attempt should help to define exactly what you should be working on (and you CAN still order an ESR for a cancelled result).
We can also use your most recent practice CAT test (the 710 on January 12th) as a basis for comparison. "Review" is an exceptionally important part of the GMAT training process; your ability to define WHY you're getting questions wrong is essential to defining the areas that you need to work on (and the specific things that you need to 'fix'). As such, I'd like to know a bit more about your last CAT. While a full Mistake Tracker would provide a lot more information, there are some basic questions that you should be able to answer (and the more EXACT you can be with your answers, the better):
After reviewing each section of this recent CAT, how many questions did you get wrong....
1) Because of a silly/little mistake?
2) Because there was some math/verbal that you just could not remember how to do?
3) Because the question was too hard?
4) Because you were low on time and had to guess?
5) How many Verbal questions did you 'narrow down to 2 choices' but still get wrong?
GMAT assassins aren't born, they're made,
Rich