I received an upside down rear piece and he has reached out to me to rectify the situation. What I find odd is the rectangular piece on the underside of yours. I don't have that and I wonder why? Mine touches the floor but the gap for the plastics is just like yours. Also my door situation is similar but mine doesn't squeak. I'm trying to figure out how to go about this.
Edit: wanted to clarify. Not the rectangular piece that goes over the "U-hooks", the larger ones closer to the door