Is it normal for the last two feet of rub rail to be pulled away from the hull rear underside of rail? My 2015 721rails were installed this way. A clear silicone was used to fill the gap between rail and hull but an 1/8" gap still exists and attachment screws are visible. The gap also partly extends around rear corners. Seems this could cause rails to be easily ripped off rubbing a dock with some wake action. Am I picking fly poop out of black pepper? Anyone else have this condition?