I've taken every free gmat cat there is. I cant remember this one specifically, but as far as correlating to your actual results there were only 2 that I found useful, the rest I ignored completely. They were manhattan cats and obviously the official gmatprep cats.
I found the others were either not appropriate in level of difficulty or just off topic in subject matter.
One thing to note with manhattan cats is that the math is a pretty good reproduction of the actual test, but the verbal can be weird at times. Overall they are in my opinion the best of whats around aside from gmatprep.
So dont fret about your marks. Especially since you havent finished your study plan yet. The most important thing is to be learning from your mistakes.
For a review of cats:all-gmat-cat-practice-tests-links-prices-reviews-77460.html
for tips maybe check some of the pros with the sticky threads share-your-gmat-experience-8/
and also for strategy everything-you-need-to-prepare-for-the-gmat-revised-77983.html
this should help you come up with a game plan suitable for you.
hope that helps,
good luck with your studies,