I wonder if this got messed up because they added multiple camera support back in 5.1.2p2.
I would like to see position tracking and monoscopic settings be settable per camera. Now that we have option for eye selection per camera, as well as layered cameras, it also makes sense to have these options be on the camera as well. Position tracking option per camera will be necessary to fix some of the camera issues people are seeing (water/mirror effects, etc.).
It would be cool to have monoscopic camera for rendering distant objects (background space, city skyline, mountains, etc.), and another stereoscopic camera layered on top for close rendering where depth actually has an impact.