Same issue on my 2026 RAM 3500 Big Horn. I have checked 5 other Big Horns in the Norther VA area with 8 foot beds and they all have the same issue. Over 1/4" lower, the last 2 feet near the tailgate. See attached. RAM Service Manager is not sure what to do....HuhhhhThe bed rail sits over 1/4" higher than the tailgate at an angle