XBMC ignores <Sorttitle/>

[smitbret]

I have my files and playlists set up with <sorttitle>. Mezzmo recognizes it just fine and populates the libraries properly in Mezzmo and in Mezzmo Android, but XBMC is ignoring them. For instance, I have Batman Begins from The Dark Knight series set as "DarkKnight01" and The Dark Knight set as "DarkKnight02". If I go to all movies Batman Begins still shows up alphabetically in the B's. If I go to the 'rolodex' where the movies are broken down by letter, Batman Begins shows up (appropriately) in the D's because Mezzmo's Smart Playlist sorts it that way, but is the very first entry in all of the D's because XBMC sorts the titles in 'D' alphabetically and Batman Begins comes before anything that starts with a 'D'.

Is this an issue that can be resolved with the Device Profile or is it something where XBMC/Kodi is just failing to recognize the Sorttitle at all from Mezzmo?

--Update--
Looks like an XBMC/Kodi issue. I installed Plex to see how XBMC handles another UPnP server and aside from the fact that Plex didn't populate any art or metadata except Duration, Year and Title, it didn't sort by the <sorttitle> field either.