In SL Room Control, I have my four speakers available in the SpeakerNet view, however, I am only able to drag one into the group window...once I do, the view window changes and I can't access the other three to drag them into the group window. Only when I delete the added speaker from the group view, can I get back to seeing the other speakers. Am I doing something wrong? Is this a known bug? If so, is a fix on the way?