this is based on a kaplan instructor:

the 2 digit score is NOT the percentage calculated from the 3 digit score. the 3 digit score has standard deviation of 20 while the 2 digit score (avg. is 84) with standard deviation of 4. the 2 digit score is derived from 3 digit score. just set a goal and try to acheive it.

the waiting period to get results has to do with security reasons. cameras are constantly on you. the examiners check for irreularities on test results that would've possibly been due to cheating. so, they have to do security checks and that's why it takes time to get the results.