If an object is travelling at almost the speed of light and it emits an electromagnetic wave in the same direction it is travelling, this electromagnetic wave will still only travel at C. To me this implies that there is some sort of underlying (moving) medium that is carrying electromagnetic waves at the constant speed. I assumed it would be the expansion of space itself.
As for the universe expanding faster than the speed of light, over vast distances there is a much greater amount of expanding space which is compounding the effect perhaps giving the impression of the universe expanding faster.
Just ideas...
