When is the media gonna tell us that he had two rooms?
I suppose when there is ample evidence he had two rooms. It's been my experience, the news media wants all the details as soon as possible. They love a scoop. Often times they will run with a story prematurely and get things wrong.
The police have no interest in covering up details, but they weigh what they can release without hindering the investigation, with getting the information out to the public. I've seen on more than one occasion the police, hell, my department, release details shortly after an event, trying to appease the public, and then later have to recount that information. In every case, there was a certain segment of the citizens that immediately cry "cover up". So it's always a risk shortly after an incident.
There may have been two shooters, there may not have been. Lack of windows broken out would indicate if there was, it wasn't from that casino or at least the rooms. But whatever the truth, I have no doubt as that information becomes clear, we will know it when it's appropriate to let it out.