Hi Starpeople,
When big 'swings' in scores occur, you really have to define the details of how you went about taking your CATs.
When you took your CATs:
1) Did you take the ENTIRE CAT (including the Essay and IR sections)?
2) What were the Quant and Verbal Scaled Scores on each CAT?
3) Did you take them at home?
4) Did you take them at the same time of day as 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?
7) Had you seen any of the questions on those CATs before?
While it might be tempting to take another CAT soon, you shouldn't take another one for at least another 4-5 days (so this upcoming weekend would probably be best). Your study time this week should be spend reviewing your CATs and getting in additional practice reps.
GMAT assassins aren't born, they're made,
Rich