You've lost track of the original question that Nancy posed to him tonight, which was, why Nejame didn't return Nancy's call the very first night about the dress in question.
Remember that her phone call was before Cindy went on air with Caylee's dress. At the time of Nancy's call, that night, it wasn't Nejame's place to discredit that dress - he is not involved in the case, and the dress in question pertained to that case.
The next morning, after Nancy's phone call to Nejame, Cindy appeared on TV with the dress. She can legally involve herself with the dress and show the world that she was still in possession of it, discrediting the found/planted dress.
Nejame, due to the fact that he's not on the Casey/Caylee case, can't interfere by going on National TV, or Nancy's phone and inject himself in the Casey/Caylee case.
He did the right thing as a very educated, experienced Attorney, Nejames doesn't insert himself in cases where he has no place.
Respectfully, I completely disagree with your take on what is being said here.
Nejame represents CA and, as I mentioned in a post above, to which you have yet to respond, he doesn't have any retainer agreement limiting his representation in the narrow fashion that you are suggesting.
THE REALLY IMPORTANT PART is that although it's not his "place" to discredit evidence that the state or defense may rely upon, he does have a duty to his client, CA, to make sure she doesn't unnecessarily involve herself in the criminal matters to which she is not a party. If his client went on national tv, he darn well should have been consulted. The fact that he obviously was not shows a deep disconnect between attorney and client.