On the dashboard for a list of the appointments. A tutee can override the tutor's choice to accept or deny an appointment by cancelled the appointment once it is made. When the appointment is cancelled it gives the tutee the option to "Accept" or "Deny" the appointment thus bypassing the need for the tutor to make a decision.
It looks like what needs to be done is the temporary options that are available to the user need to be removed for cancelled appointments. The comments say that this was used for testing purposes.
Was allowed for debugging purposes. Removed those options to resolve.