Hi paulakincaid2018,
I'm sorry to hear that Test Day didn't go as well as planned. When these types of score drops occur, the two likely "causes" involve either something that was unrealistic during practice or something that was surprising (or not accounted for) on Test Day. If you can answer a few questions, then we should be able to figure this out:
When you took your CATs:
1) On what dates did you take each of your CATs and what were your Scores on each (including the Quant and Verbal Scaled Scores)? While assembling this data be a tedious task, this type of information helps to define patterns and potential 'procedural' issues in your schedule over the last several months.
2) Did you take the ENTIRE CAT each time (including the Essay and IR sections)?
3) Did you take them at home?
4) Did you take them at the same time of day as when you took your Official GMAT?
5) Did you ever do ANYTHING during your CATs that you couldn't do on Test Day (pause the CAT, skip sections, take longer breaks, etc.)?
6) Did you ever take a CAT more than once? Had you seen any of the questions BEFORE (re: on a prior CAT, in an online forum or in a practice set)?
You might also choose to purchase the Enhanced Score Report. While the ESR doesn't provide a lot of information, there are usually a few data points that we can use to define what went wrong (and what you should work on to score higher). You don't have to purchase the ESR for both of your Exams (just the most recent one would be fine). If you purchase the ESR, then I'll be happy to analyze it for you.
GMAT assassins aren't born, they're made,
Rich