I also can confirm that what strugglesreal said, as I had multiple admissions representatives tell me that it is not ranked and they review many applicants on the WL and HPWL for admission when they have their committee meetings. One had told me that they can choose individuals from the WL over HPWL depending on the applicant's profile, as the only difference between the two groupings is that the HPWL is a next cycle acceptance for sure.
The open house was also amazing and they'll keep having movement within their class as we can see above too since they have plenty of students choosing other schools prior to the start of their classes. I was told the most movement happens in May but anything can happen between literally now and the day they start classes, although they try to seat their class as soon as they can so we can participate in things like the pre-matriculation program or find housing in time to move and begin courses. Their class is definitely full, but as people drop for other schools the more we'll hear about WL movement!