Looking at the website for this site, it is not possible to rent single beds (or even single rooms) but is rented all-or-nothing.  It is therefore not a 'hostel' but rather a large OSM 'chalet' as was previously correctly set.
See 
https://wiki.openstreetmap.org/wiki/Tag:tourism=hostel?uselang=en-GB
https://wiki.openstreetmap.org/wiki/Tag:tourism=chalet?uselang=en-GB
and 
https://wiki.openstreetmap.org/wiki/Tag:tourism=guest_house?uselang=en-GB
Also you set a guest_house tag which is a sub-tag of tourism=guest_house, which this is not (and you did not select either).  Reverted.