AUTOMATIC DUBLE RENDERING! whats wrong?

Hi I have very big problem
When I make automatoc scene render (picture)


And when I have for exaple 4 scens, my sketchup rendering:
first scen x2
second scen x2
third scen x2
fourth scen x2

And time what my Skp need to render all scens is x2 longer.
I dont know where is a problem. I make default settings and my problem still is…
PLEASE HELP