Though I have not appeared for test2, I m sure they have different pools.
In exam folder of gmatprep we have different dat files.
the size of test1 and test2 files is quite big, proving that the pool questions of tests are different than that of review questions option, which actually has 15 questions each.
I renamed the test2.dat to test21.dat and the gmatprep failed to start.
I copied ds.dat and renamed it to test2.dat and when I started my test2, ds 15 questions set was started.
I think pools of test1 , test2 and the review sets are different. So keep squeezing out of test1 multiple times and then start test2 near your exam. I will post the analysis once I m done with both the tests.
Moreover if the tests have same pool, why gmac will provide two different tests along with the option to reset?
Cant they provide just one test and a log file to track the questions already completed?

Good luck.