Hi @Megan1434
I'm afraid this doesn't make sense and something went wrong.
When a listing is booked, the calendar dates are automatically blocked in real time. If the host canceled the booking, the guest would automatically have been notified and the cancellation would show in the message thread of the booking.
It's possible that the booking never went through (perhaps the booking request was denied). If this was the case, the booking amount would not have gone off the credit card.