Appointments+ : Wrong available hours

My Service Provider is available for the whole day, hours: 9.00-22.00 without brakes. But his schedule appears availability every 3 hours (10.00, 13.00, 16.00, 19.00, 22.00). The other service provider's schedule is displaying correctly. Why is that happening? The link to check this out is: mydomain.xx/1/massage-therapists/. I have already enabled access to my account. Thank you!