My company is an auto detail company. Different services take different times e.g., A simple had wash will take about 30 minutes where a full detail will taks about 4 hours. I have defined both services with those intervals. When I select that service to make a appointment, my only options are 8:00 AM. 12:00 noon, and 4:00 PM. Since no other appointments are on that day why don't I see all times and then once a time for the appointment is selected, say 9:00 am then the next 4 hours should be blocked out? Why am I limited to those 4 starting times? This is 2 restrictive.