Booking capacity is counted in guests, not in bookings. Each booking uses as many places as its party size for its entire duration, and a time is offered only when enough guests can still fit for the whole booking.
Where capacity comes from
The location sets the total in the Location capacity tab, either with Set a number or with Use floor plans. In the booking list editor, List capacity decides how the list uses it: Shared location capacity shares the full total with other lists, while Allocated capacity sets aside part of it for this list. When the location uses floor plans, the item is called List floor plans, and you choose All tables, Selected zones, or Selected tables.
What affects a time
Existing bookings, blocked days, working hours, booking frequency, duration, party size, and floor-plan rules can all affect the result. Two bookings with the same start time are valid when capacity supports both.
Party-size limits and capacity
The party-size Minimum and Maximum in Form fields are kept when you change capacity. If capacity drops below your configured maximum, WaitQ asks Change party-size capacity? and shows the previous and new limit. Choose Confirm and save to continue; your configured maximum is retained and applies again if capacity increases.
Troubleshooting
If a customer cannot see an expected time, check the selected service first, then review its duration, the bookings that overlap it, and the list's working hours and advance-notice rules. After changing capacity, test both a small and large booking and inspect the final slot of the day.