In some cases it may happen that the occupancy levels are showing incorrect information. As the occupancy levels are adjusted every time a change is made the levels could sometimes be affected (an interuption, computer reset during editing a reservation for instance)
From the file menu you will find the option to recalculate the occupancy levels. Select this option and the program will recalculate the levels using the reservation data.
Also to note that you have an option to display the occupancy levels or the number of vacant rooms this option could be selected from configuration / screen settings tick “show no of vacant rooms”