Hi zzarur,
Given the similarity of these recent CAT scores, and the length of time that you've been studying, it's possible that you're 'stuck' at this particular score level. To score at a significantly higher level, you're going to have to change how you "see" (and respond to) the GMAT - and it doesn't seem that your current study materials are helping you to do that. From what you've described, it sounds like you really want to apply to Business School this Fall. If you want to stick with that timeframe, then you're going to have to make some significant changes now, so that you don't 'waste' the next couple of months studying in a way that might not lead to improvement. Since you'll need to improve in BOTH the Quant and Verbal sections to hit your goal, you should be studying some Quant and some Verbal each week, with an emphasis on learning and practicing the proper Tactics.
1) Going forward, how many hours do you think you can consistently study each week?
GMAT assassins aren't born, they're made,
Rich