unity music lense do not support discnumber field in tags

[Deleted]

Unity Music Lens do not support discnumber field in tags in Preview mode.
So, If I have 2CD Album and music files have the same values in album field but "01" and "02" values in discnumber field and its tracklist is

AlbumName
CD1
1. Song 1
2. Song2
..
9. Song 9
CD2
1. Song 10
..

then I see the following in Previews in music lens:

AlbumName

1. Song 1
1. Song 10
2. Song 2
..
etc

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: unity 6.10.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu6
Architecture: i386
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,gnomecompat,place,vpswitch,mousepoll,session,imgpng,regex,grid,snap,resize,obs,wall,move,animation,unitymtgrabhandles,fade,workarounds,expo,ezoom,scale,unityshell]
Date: Sat Nov 10 18:16:55 2012
InstallationDate: Installed on 2012-09-08 (63 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: Upgraded to quantal on 2012-10-17 (24 days ago)