According to what I've heard, schools are not meant to know the school preference order of individual applicants, but they may have a rough idea of the number of applicants choosing the school as their first preference.
However, I'm not sure if this is the same case to in-year applications. Will the school know the preference of the applicant? Given that in-year applications are uncommon and not submitted in the normal schedule.
Welcome to reply in this thread/pm.