I had this same exact problem and it drove me crazy!!! I believe it has something to do with pop up blockers being enabled on your computer, which prevents the next section from coming up. Although this would only happen if it was somehow accessing the internet, right? I read this on a thread on this site, but never actually took the steps to remedy my situation b/c I had already taken most of the tests (half of each, mind you

). I tried to search for the thread but couldn't find it. Its on here somewhere, or contact PR, see what they say.
WRT your score, that does seem a bit high but your scoring really depends on which types of questions you get wrong, since its adaptive. If you got mostly tough questions wrong, even 10 wrong would still be a good score. With that said, however, I still had some questionably high scores on PR CATs. My advice is really know the errors you're making and take the actual test score with a grain of salt.