@Pete2785
It's a common, ongoing issue - Instant Book turning itself on, calendars becoming unblocked resulting in bookings received for unavailable dates, bookings received that don't adhere to parameters hosts have set (ID verification, guests with previous good reviews etc), bookings received for fewer nights than host's minimum, last minute bookings received in contravention of hosts' set preparation times, bookings received at much lower rates than host had set etc etc. Some hosts will put themselves through the torture of dealing with customer support to try and have the unwanted, unexpected bookings cancelled - but many will just go ahead and (reluctantly) honour the booking, for fear of being penalised, losing Superhost status and so on
Airbnb will invariably lay the blame on glitches, but others might say it looks suspiciously like channel stuffing - a deceptive business practice used by a company to artificially inflate its sales and earnings figures by deliberately sending vendors along it's distribution channels, more products (goods or services) than they are willing or able to sell to the public. A ruse typically employed by a company that desperately needs to convince people that its finances and operations are in much healthier shape than they actually are. Such as when there's an IPO coming up, for example.
