Those circle shape indicators on the second floor shouldn't be appearing there. As you can see, there is nothing coming there through the space belts.
That space belt is split two branches: the first branch, which is the one shown in the image, only has that first floor of squares in the four belts.
The second branch goes to another platform and sends half of those same squares on the first floor AND those 3/4 circle shapes. The logic is confused in this situation and is showing the indicator in all branches of the space belt (hope that makes sense).