Q: What is "Drilling"? Does it have anything to do with BR?
(Answer by @Pacifico)
A: Drilling is when you work on specific issues you have rather than full PTs. You should BR when you drill but BR itself does not ...
@nicole.hopkins
http://www.top-law-schools.com/forums/viewtopic.php?t=211572
The applicant who was deferred to RD and eventually accepted had a 2.8 and a 176.
If you choose the incorrect answer on BR that means you need to go back and review that question - there is a good chance that either you are second-guessing yourself too much, or you may have an issue with the underlying content of the question.
If that's going to bother you then you might want to switch to a different test center. This site has reviews of test centers: http://www.simugator.com/lsat-test-site-rater.php