it looks like you have a List of Points -thick connection spaghetti- (A) for which you are checking inclusion with a single Curve -thin connection spaghetti- (B)
idealy, you might want to check for Point Inclusion not just with the ground floor Curve, but with all the Curves of each floor
another way to do that might be to project all the curves of each floor on XY Plane, intersect Region on those to find a common area to all of them where Points can exist on all floors, and then run Point inclusion on that area
you will understand that it is pretty difficult to give straight answers to screenshots made of pixels 
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