I have a 2000 mustang convertible with a roof drainage issue. The 2 pc roof was replaced august 2019 with a 1 pc vinyl rear window top from KEE AUTO TOP. A month later it developed a drainage issue on the drivers side. The draining water now tracks along the bottom edge of the "cloth" from the quarter window towards the rear of the car. Some of it misses the body drainage cavity which results in wet carpet under and in front the rear drivers seat. No, the drains are not plugged, I checked them with a garden hose. The draining water never reaches the body cavity to get to the drain holes. I can make a video link available if required

water tracks along bottom edge of fabric towards rear of car. ends up under driver seat