This article shows you how to handle the perspectives of multi-screen setups.
By changing the "Origin" of the a layer in Compositing its possible to decise if you want to have a correlation between content and screen position - "Home Screen Perspective" , or whether you want to handle those positions completely independently - "Absolute".
This allows great freedom for tracked setups.
Keywords: Change Origine to Absolute and Adapt Layer Offset, Change Origine to Absolute, Do Not Adapt Layers, Home Screen Perspective, Tracking