CDS data is for enrolled students, not accepted students. Sometimes mid 50% test score data is lower for enrolled students as compared to accepted students. Check each school’s website (and student newspaper) for accepted student data, some schools publish that info, others don’t.
It’s too simplistic to use mid-50% test scores data alone to categorize schools. If we did this, students with a 36 ACT would mis-categorize some single digit acceptance rate school, when they are actually all reaches.