Even if this host's listings weren't duplicated, I wouldn't book with a host like this because of what I discovered by reading the reviews. He appears to be one of "those" hosts who is really nice with guests if all goes well, but if a guest dares complain about something not right, he becomes rude and defensive/aggressive.
This is one reason it's one of the good features about Airbnb that the reviews for all of a host's properties, even though they may no longer list one or more properties, stay on the host's profile.