Why can’t I detach single layer from the camera layer

Hi All,

I have been trying to do the above with no success. The camera layer which is a motion tween, is attached to all of the scene's layers however, I would like to detach one layer so it does not participate in the camera's motion tween. 

In Add Camera mode have tried to detach the single layer by clicking the camera icon just to the side of the hide layer icon on the layer I want detached. Unfortunately this either attaches or detaches all of the layers from the Camera Layer, like the parent icon up the top next to the trash can icon.

I also tried via the layer's properties but it resulted in the same as above. Any ideas?

Kind regards

Iota