Example, there are free time between 10 - 16. I have min time 30min to making appointment, if you pick 1hour (60min) appointment it shows available time 10 - 15:30. So it takes 30 min free time and makes it not available anymore. If you pick even longer time like 2 hours then it blocks even more time to use. Whole free time is visible only min 30 min appointment time. Cant find what to change to fix it.