Hi Sloth45,
I'm really sorry to hear about the technical issue that you faced at the Testing Facility - and I'd be unhappy about it too (although it's worth noting that that type of issue does not happen very often). What's ultimately unclear at this point is what impact that actually had on your Overall Score. Since you had already completed the Quant section and the Test 'froze' at the end of the Verbal section, you had already answered most of the questions. If you had left those final 6 questions unanswered (meaning you did not physically answer them), then THAT could have hurt your Score a great deal - but if you answered those 6 questions (even with just quick, educated guesses), then you likely got at least 1-2 of them correct. All things considered, it's certainly possible that you could have scored a bit higher, but this incident didn't keep you from scoring 650.
Thankfully, the GMAT is a consistent, predictable Exam, so you CAN train to score at that higher level - and you might be able to hone the necessary skills to do so in 1.5 - 2 months.
Before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
1) Over the last 3 months, how many hours did you typically study each week?
2) What study materials have you used so far? Did you take any other CATs/mocks besides the 2 Official ones?
3) On what dates (or approximate dates) did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
4) When are you planning to apply to Business School and what Schools are you planning to apply to?
Since you took your Official GMAT at a Test Center, then you might also choose to purchase the Enhanced Score Report. While the ESR doesn’t provide a lot of information, there are usually a few data points that we can use to define what went wrong on Test Day (beyond the tech issues that you described) and what you should work on to score higher. If you purchase the ESR, then I'll be happy to analyze it for you.
GMAT assassins aren't born, they're made,
Rich