I have Next Gen seats in a 90D delivered 10-5-2015, along with Tesla All-Weather Mats. I don't have the problem the OP seems to, and if I captured the same location in my photo #1 below, you'll see my mat is a perfect fit. I would suggest owners with this combination of seats and mats must spend the extra effort to (force) fit the mat underneath both sets of rails (as suggested in the instructions that came with the rear mat) -- see my photo #2 below, otherwise the mats will deform as the front seats move back and forth.