Same time slot is bookable more than once
I have created two services for example phone consultation and face to face consultation. They are each 20 minute slot. I have put the daily limit has three for each of the services. Problem is that if I book 6:00 PM slot for 27th of July for phone consultation (the booking is confirmed). BUT, when I go back again, I can still book 6:00 PM slot for 27th of July Phone consultation. Normally it should not be available 6pm slot. Is there a bug or can you advise?