Any idea why this is?
This has been discussed before - no, I have not. According to my understanding of how the view manager operates this should be okay, and I'm as baffled by the issue as anyone else.
Oh, and by the way, because nobody never ever asked for it before, could we have a 3rd landing light?
Has been asked before. The answer is no - unfortunately everyone will pay the framerate hit for all that's implemented even if they use only one light. So for the time being I'm not going to customize this further, sorry.