Most people study for 3-4 months minimum, so to start, 2 months may simply not have been enough time.
You don't mention your goal score, but if it's a lot higher than your current scoring range, then you will likely need more than 3 weeks to get there. (eg, if you are going for a 700, it's unlikely that you will get there in 3 weeks.) I know that's probably not what you were hoping to here, but it's better to have a realistic view and make good decisions accordingly.
One major cause of the "I feel like I'm learning but my scores aren't moving much" phenomenon is timing - if you've got timing problems, it will mess up the whole section.
You can use this article to analyze your recent MGMAT CATs to see whether you have timing problems (and learn more about your strengths and weaknesses):http://www.manhattangmat.com/blog/index ... ice-tests/
Then come back here and tell us the results of your analysis. (Note: do share an analysis with us, not just the raw data. Part of getting better is developing your ability to analyze your results - figure out what they mean and what you think you should do about them!)
Also, please let me know:
- your goal score
- what study materials you have available
- how you have been studying so far
And check out this article for other resources, in particular the How To Study section:http://www.manhattangmat.com/blog/index ... -the-gmat/