we only have one schedule calendar for Calendly and yet randomly it will allow more than 1 person to be scheduled for the same time and date.   twice it has allowed 3 different people to be scheduled at the same time slots.  we do not use another calendar both for our own convenience but also for keeping things simple for this app.  most of the time this does not happen but when it does it creates a big mess with clients who expect this to be a very easy process.

please provide some guidance.
 

Thanks