I just made some UTDrums in 2015 but they Generate in Mono same as 2014 UTs.
I think because PG uses BB you can't SEE tracks, even the Audio track that is the ONLY track you can SEE shows as MONO even if it is a stereo track.

Tracks in Realband:

Top track original Stereo
Middle track RB Generated Mono
Bottom track BB Generated Mono (Drag Export)



This is the Audio Edit window in BB, shows Stereo file as Mono.




If you could "SEE ALL" the tracks in the Audio Edit Window in BB if they are Stereo or Mono this would not happen.