Roon identifies both :-
Bloc Party : Silent Alarm http://www.discogs.com/Bloc-Party-Silent-Alarm/release/461406
Bloc Party : Silent Alarm Remixed http://www.discogs.com/Bloc-Party-Silent-Alarm-Remixed/release/744689
-as the “Remixed” album.
Reverting to my own tags fixes this.
Yes, but the album review is for the remix album, not the album proper.
This is a very common thing with Roon and I have several albums which are attributed to the wrong album and to my knowledge has never been fixed although it has been addressed to the Roon dev by several people here.