I've found several instances of the same listing being offered by several different hosts.
Here are two examples:
https://www.airbnb.com/rooms/32048603
https://www.airbnb.com/rooms/22805425
and
https://www.airbnb.com/rooms/25129364
https://www.airbnb.com/rooms/26657423
There are actually more than two for both of these listings but that should show you what I mean.
As a host, this kind of thing is really irksome as this is my competition. They are essentially trying to flood the search. It's unfair and probably against the TOS.
I've actually seen this happen multiple times before in lots of searches.
What gives?