I would strongly caution against taking your Kaplan practice test scores too seriously. It's fair to say that Kaplan test scores are lower than the real thing
on average, but everybody is a little bit different, so you might have a completely different experience. If, for example, you've used a lot of Kaplan materials, you'll probably do disproportionately well on their tests, since you'll be accustomed to their writing style... and yes, Kaplan methods tend to work much better on Kaplan questions than on the actual GMAT.
It's absolutely impossible for test-prep companies to perfectly copy the style of the GMAT, and the only truly trustworthy practice tests are the GMATPrep exams--and even then, your GMATPrep scores could be inflated if you've already seen some of those questions. Try not to get too high or too low based on your practice test scores, especially if you're using non-official tests. Learn as much as you can from your mistakes, focus on nailing the timing, and don't stress about the numbers at this point--it can be awfully hard to make sense of scores from Kaplan tests, unfortunately, and it's best to take them with a grain of salt.
Good luck with your studies, Dixon!