Hello There,

Welcome to OSM, please first realise this mapping business can become addictive, be warned.

I don’t know why the “update in progress” still persists but here are a few observations of the changeset. Firstly amenity=hospital is wrong as I think you suspect, amenity=retirement_home seems to suit your purpose http://wiki.openstreetmap.org/wiki/Tag:amenity%3Dretirement_home
Secondly the area needs to be tagged “building=yes” if indeed it is a building.

Regards
Bernard