Double booking due to calendar error

[Laura666]

One of my bookings for next month isn't showing on my calendar. This just came to my attention since we received another booking with coinciding dates. At first I thought they were back to back which we try and avoid by blocking the prior and following day for prepping but the first reservation doesn't appear all together. What should I do? How can I get that reservation to appear on the calendar and what happens now with the conflicting dates booked?

[Fiala0]

With an instant booking I have got double bokking on the same date. It is very unpleasunt situation and I am trying to turn the instant booking off. How would I do it and how to avoid the penalty case. Please anyone help me. Thanks in advance 

Fiala