Okay so the format you are using for adding the overlay next to the background is not correct.
The correct format is:
BACKGROUND with OVERLAY to scale x y
So if the overlay’s scale size is 0.8 and the shift coordinates (where you placed your overlay) are 120 95, then the format looks like this:
BACKGROUND with OVERLAY to 0.8 120 95
Also, scaling the overlay to 0 0 means there’s no size which means it’s not there.
More about overlays here: A Guide to Using & Animating OVERLAYS