The latest revision is the 0.45, can you send it back to us so we can update the firmware or have it replaced?
Please copy or make a screenshot of this thread and send it to [email protected]
Hopefully it will resolve your problem.
Note that the surface can only support 3 external screens when the surface screen is off. You can always use the CSV-5400 on a discreet graphics card to support up to 4x 1080p screens.