Sketchup VRay Animation Render - Scene 'Include in Animation' not working

So I typically run vray animations of my building design walkthroughs.
I break the animation batch renders into smaller scene groupings.
(Eg. Run Scene 1-4 first, then run scenes 4-8 after)
I do this by using the toggle on of ‘Include in Animation’.

This method has always worked for me - however today when I am attempting to select scenes to include in the animation, the render begins from the beginning (scene 1)or the hilighted scene regardless of if the box is checked or not.

Does anyone know why this may be as its not really running as it used to/as expected.

Thanks in advance.