Hola amigos,
 
 I have a folder for Addictive Drums 2 in which I have several MIDI tracks (I prefer to keep takes in their own tracks because when I open the piano roll (drum grid) I can only see the notes for that specific take instead of all the notes for all takes together, which makes it impossible for me to edit. When I open the synth rack and select AD2, it automatically highlights a specific MIDI track in the track view no matter which MIDI track I had selected before I opened the synth rack. This is driving me nuts because I have to go back and find the track I was working on again.  
 
[This issue has been solved] Also, when I unmute one of the MIDI tracks it unmutes everything else in the folder, although that MIDI track is not assigned to any group.  

The mute/unmute "issue" was a new option under the synth rack called "enable smart mute" which was checked automatically. I don't see this option in sonar X3e. Regarding the track that goes into focus in the track view when I select the synth in the synth rack, I just realized this also happens in X3e, so it's not a Platinum problem, but a feature that I need to figure out how to change.