Calendar Bookings Weird Effect

Im getting older and only want to do 1 photo shoot a day.  But I do offer time slots on custom days so the clients have option of when they want their shoot to start eg. 10am 1pm and 4pm.  So I have set available times between 10am and 5 pm with 3 hour between.  so the website displays 10am 1pm and 4pm which is perfect.  I have set the duration of each session to 8 hours with a 8 hour prep time - thinking that if someone booked any session time on a day it would automatically lock out all the other slots - and so on that day their could be no other shoots are available.  However I have a booking at 10am booked and then I get weird time slots appearing on that day for 4am 8am??  I assume there is a bug or I am setting it up wrong and causing the error.  I have since edited the booking to be an all day booking and so have essentially locked out the day

 No bug you just have it set up way wrong. see the manual on booking calendar.

Tim

I am finding clients can book time slots that overlap each other in the calendar causing me issues.

I have one service (Service A)available that has options for 10am 1pm and 4pm time slot bookings.

I have another service (Service B) that can also be booked on that day - but it is an all day booking

If service A is booked first, a customer can still book service B causing a conflict because now there are 2 bookings overlapping.

If Service B is booked first, customers cannot then book service A which is 'good' as the day is now made unable. 

How do I get service A to not allow service B to be booked on that day as they would overlap ?

I can confirm the same behavior is happening on the demo site.  I was able to book a wedding and boudoir session at the same time (day) if I booked the boudoir session first

There is a overide option you have set. Un check those boxes.

This doesn't sound like a functionality the Sytist booking calendar provides. 

Might be best to make it an all day event and create an option for the time.

is it a possibility to add a functionality option that both time slot and all day events can be used on the same calendar system to avoid double bookings