Acceptance Rate is different than Admission Rate.

Acceptance Rate is the percentage of those who apply that are accepted by the school. Lower acceptance rate implies being more competitive and exclusive, therefore better.

Admission Rate is the percentage of students who were accepted that actually choose to enroll in that school. Higher admission rate implies that the school is a more desirable destination, as students who are accepted select it over other schools where they were accepted. Therefore, higher is better.

Most schools seem to obscure these numbers, either intentionally, or out of ignorance / incompetence. BYU included. They use the terms Accepted/Acceptance and Admitted/Admittance/Admission interchangeably and inconsistently. So do publications that report such stats.

IOW, it's difficult to glean any meaning or comparison whatsoever from those numbers.