Our standard minimum is 3 nights. We have a few dates that are 4 night min. We had a host book 3 nights under dates that were all clearly set as a 4 night minimum. This was a problem last year, but to my knowledge they were only allowed to request to book (we have instant booking), but this time the guest booked 3 nights, all of which were set for 4 night min. In fact we have a 5 night stretch that were all set w 4 night minimum and the 3 nights was booked right in the middle. So we contacted the guest and let them know they could either book an additional night or we will have to call Airbnb and get them to cancel the reservation. The guest chose to add a night so it all worked out, but this is a real pain. This is apparently a glitch that needs to be handled by Airbnb.