The list is pretty fluid and tends to shuffle every wed when they update the staffing. If a list for the next class has been published those slots stay assigned but their positions may no longer be in order at the top.
I've also noticed with the enroute list there have been times where they didn't use all the top slots. Maybe there's someone's discretion involved.
Question about staffing- if a facility is at around 80-84% staffing and 85% is the number where ARTCC's will allow people to release, does that mean it will appear on the list less often for Enroute placement?
Will it not appear on the list once it hits 85%?