Hi JeevesAsk,
First off, it would make sense for you to start your own thread, so the conversation/advice can stay focused on your specific situation. If you read my prior post in this thread, then you already know that there's an immediate issue with how you took most of your CATs that you listed - you skipped the Essay portion on almost every one of them. By extension, you took a shorter Exam each time that required less effort and energy from you. The one FULL CAT that you appear to have taken is the 2nd of the two Free GMAC Exams - but considering how long you've studied, I find it difficult to believe that you had never taken that CAT before (or that you had never seen any of the questions on it before).
Based on your recent Official Score result, your scores dropped in ALL of the sections, which hints that there might be other factors (besides how you took your CATs) that impacted your performance, so I have a few additional questions about the lead-up to Test Day and Test Day itself:
1) What did you do in the 3 days before your GMAT?
2) How did you sleep the night before your Test?
3) How long was the ride to the Test Center from your home?
4) Were there any distractions at the facility or during the Test?
5) What did you do during the two 8-minute breaks?
6) Did you finish any sections early?
7) Did you have to rush to finish any sections (and guess on questions just to finish on time)?
GMAT assassins aren't born, they're made,
Rich