When an Instructor blocks him/herself off for a day or recurring set of days via the My Account>Work Schedule tab, if there is a schedule in the future, it would be helpful if a conflict notification would appear, and allow it to be over-ridden, or deleted, etc.
Example: I scheduled a student very early in December for a flight on a Tuesday in the middle of February. However, starting January 1st, I began taking all Tuesdays off. When I created the "Tuesdays off" schedule under "Work Schedule", I expected that it would have told me of any Tuesday appointments in the future under my Instructor name.