@Ed358
As far as I can see, the wording on the Flexible cancellation policy hasn't changed, i.e. if the guest cancels less than 24 hours before, you are supposed to get paid for the first night.
Interesting that you say Airbnb, not the guest, cancelled. Could the guest have claimed extenuating circumstances? If so, then Airbnb will override whatever cancellation policy the host has is place.