The reason why it is not showing on your avatar is because I believe the renders use 2013L and currently shirts and pants with packages do not show since the packages's scripts are not programmed to add CharacterMeshes instead normal SpecialMeshes. In this case, this would only "work" if they were 2014, but 2013 supports it too.
Which is kind of odd.
This can only be fixed if the renders are using a different client version, say 2014 or up, or 2012.