That seems like the same situation -- it got 1300 on a practice test where a bunch of Internet sources discuss the exact questions and answers.

I tried feeding it an LSAT logic game which has multiple explanations on the internet. It got 2/5 correct, and for one answer it said “E, none of the above”

E does not say none of the above on this logic game. Though many other different standardized tests do use E as none of the above. So it was pattern matching to that and not the text in front of it. And it wasn’t using explanations