Just to follow up here to the last post. I've been dealing with this via a support ticket, but the problem is not yet resolved. I have however made my own work around to the issue. Here is an email I sent to support via the ticket system on April 17th:
Dual monitor issue work around:
If the host pc is at the Windows 7 login screen, RUT will not allow me to select a monitor to view. It shows both. In order for RUT to detect both monitors and allow the user to select which monitor to view, the user must:
1. Via the RUT Client Viewer, enter Client password. Screen now shows both monitors of the Host with no way to select just one.
2. Login to Windows 7. Screen still shows both Host monitors with no way to select just one.
3. Close RUT Client window by hitting the ‘X’ in the view control bar at the top of the screen.
4. Via the Client Viewer, double click the Host again. Now the main, single monitor is full screen and you can select which monitor to view. If the main, single monitor isn’t full screen immediately, the user is a least allowed to select which monitor to view.
I’ve confirmed this with multiple hosts using the same client.
So, in short there is a bug with RUT. Perhaps it is on the host side. Perhaps it lies on the client side. Since I have only one client viewer installed, I’ve not been able to test that. I’ll leave that up to you.