I downloaded PrintableElsat from this site. I randomly picked section 2 of Test 24 to start practicing. When I checked the keys, only 1 out of the first 10 questions was right and I stopped checking.
With firm reply from 超级版主, I have to believe that keys to Elsat questions are correct. Today, I tried section 2 of test 27 and had to cast doubt on the reply. Clearly, this section has 26 questions but there are only 25 answers.
as I know, there is some errors in LSAT..but critical errors mainly exists in several LSAT sections and most errors in other sections won't influence your understanding of logic in LSAT...