It is sometimes necessary to move lessons from one place to another. This does not seem to be possible as to move a lesson from a room, the room needs to be "closed" which then means it cannot be used to house another lesson.
This seems to me to be an obviously need for every school.
I absolutely agree. We have a student with a broken leg and will have to move a few classes around to accommodate this for several weeks. This involves swapping over rooms (not always the same ones) but not closing them however we wish the timetable changes to show on student timetables.