Hey sepujr,
Congratulations on bringing your score up from 450 to 560 - while it's not quite where you want to be, it's a great positive trend and a not-insignificant accomplishment. And the great news is that it looks like you have a pretty good idea of where you'll need to spend your time from here on out, too. If those percentage-correct statistics are over a significant sample size of each question type, it looks like you have a lot of points to gain on both Reading Comprehension and Problem Solving. Ordinarily I'm not bowled over by %right/wrong stats in practice tests since the difficulty levels aren't standardized, but with your percentages that far below 50% on those two question types I'd say it's safe to put some work in there. And "work" includes:
-Analyzing your practice tests and homework sets and asking yourself both why your answer was wrong *and* why your answer was "tempting". You may be falling for the same traps frequently (for example, most people struggle with Inference questions in RC, frequently going with the "probably true...but not definitely" answer) and then you can start to address those.
-Working through problems from
the Official Guide and GMAT Prep software on your weaknesses, alternating between "test-like" timed pressure and "unlimited time" true mastery.
-Using the forums here and the Live Online Office Hours you get through Veritas to ask for assistance on problems and themes that give you the most trouble.
I should also add that there's a pretty common pattern when people phrase their experience like you did, namely dropping "% correct" and "time spent" statistics. You'll see this phrase in the first lesson of the Veritas books "never mistake activity for achievement", meaning that just putting in the time and doing more and more problems won't necessarily get you where you want to go. I'd highly recommend doing some qualitative analysis of your most common mistakes, the concepts that you know you've memorized but still don't truly understand, and that kind of thing. The more specific you are in noting what you're struggling with, the easier it is to find help and improve.