@Gwen386
I experienced a similar glitch with a request booking, but from the host side. The host sent an enquiry. They then must have sent a request (I have IB turned off), but I never received a request. It was still showing as an enquiry from my end, but then that it was awaiting payment. The guest was trying to pay with his father's card, so the payment wouldn't go through because the ID didn't match. Meanwhile, the dates (for a two month long stay) were blocked in my calendar.
How can this happen? How can the dates be blocked for a booking I never accepted? Why did Airbnb even attempt to charge the guest when I had never accepted the booking? I called CS, but they had no answer for me. They just told me it was showing from their end that I had accepted the request. I never got a request!
I had told the guest to cancel the booking and send a new request once he had sorted out his finances, which he did. As far as CS was concerned, the problem was resolved, so they had no interest in investigating the glitch.