the iCal feed for a listing has an incorrect entry
We have our own website, built with Wordpress and using the WP Booking System plugin to manage bookings and availability. This provides an import iCal feed to Airbnb, which works fine.
The Airbnb export iCal feed (which we use to block Airbnb bookings on our website) is somehow including one of the website bookings alongside the airbnb bookings.