Hi bgbeidas,
Some CATs provide more 'data' than others (regarding pacing, question types, etc.) - regardless of whether the CAT you took offered this type of information, you can (and should) do your own question-by-question review of the CAT. Many Test Takers use a Mistake Tracker or '
error log' of some type. In that way, you can define the types of questions you have trouble with, revisit them later on, practice to hone your skills (and eliminate mistakes), etc.
Since you didn't mention the specific areas that you're currently studying, it's possible that you're focusing on rare issues or ones that are not currently impacting your scores. In that same way, you might be working through content that you handled just fine when you took the CAT. This is all meant to say that some analysis of that CAT performance is in order and you should probably do that analysis before you work through any more practice sets.
GMAT assassins aren't born, they're made,
Rich