Change Origin image point of the Zone sprite to (0,0), it's currently in the center.
Also, replace (120) with (90) in that formula, because your layout height is 180px, not 240.
And one more thing - create an empty layout, name it "Assets" and move sprites like enemies, blood stains etc. to that layout.
Construct 2 requires at least one copy of each object to be present on a layout, but it doesn't need to be your main game layout, it can be an unused one.