Hi
This was a hard question to get answered. I not why Camera manager spawns a camera actor. Its for calculation that are private for the camera manager, but why have the camera actor spawned into the world and have a reference to it. What is the difference having reference to a camera actor in the world Versus having all that inside the camera manager?
Im guessing I get no answers within 1 week so I will remove this question after 7 days from now.
But I hope I get some answers until then. fingers crossed 
Cheers