Yeah, i don’t think everyone can get a 99th percentile LSAT score. Also the average LSAT score of Harvard undergrads who take it is 166, so testing well on the SAT does not mean you will do well on the LSAT. The SAT is just easier and more knowledge based than the LSAT and can be gamed through hard work. A lot of people take the SATs cold without studying, so that skews the percentiles. The LSAT is more of just an IQ test. Plus it’s pretty normal to score lower in your real test than on practice tests.
I would retake the LSAT and if she still does mediocrely and doesn’t get in anywhere good, I’d probably not go to law school unless you’re covering full costs and can afford her to have a lower paying job.