HELP!! 1450 ON SAT PRACTICE TEST! Does the princeton review do this to you?

I signed up for the Princeton review and on the first day we took a practice test and I got a 1450:(:( I'm so confused because LAST year I took the PSAT and go a 165 which converts to a 1650 on the SAT's. How much can I improve my score in a couple of months?? I've head that the princeton review gives you a really hard version of the SAT's at first then at the end they give you an easier version to make it looked like you've improved a lot. Is this true?