Ok now this might be an oddball question, but you mentioned a backlog of withdrawals which makes sense. Can the backlog of withdrawals affect how many acceptances are outstanding at any one time?
Example: School A has to fill 100 seats. They offer 120 acceptances as they want to make sure they have 100 students. 30 students also get offers from other schools and they tell the other schools that is where they are going, so they notify school A that they aren't going to attend. Now school A has to process 30 withdraws. Do they offer the 10 positions to waitlists immediately or do they have to wait for the 30 to be officially withdrawn via the system?
I want to know if I should call the admissions office and offer to help them process their backlogs if it means they get to their waitlist faster, LOL!