Hmm, then there might be another problem.
You see, I've done this and it shows correctly in the room editor.
But in game, the background[0] loops instead of being drawn only at the bottom.
I have one background[0] which is not vertically tiled and it's y position is at the bottom of the room (so that it fits on screen)
Then I have background[1] which is vertically tiled. But background[0] is on top of it, as it's supposed to, but it loops too