Good News. I found the solution in another thread. On Page 57 of the manual, there is a step-by-step procedure for disabling this feature on a seat-by-seat basis. I will disable the center seat first to solve my initial issue. However, I may need to disable this for the entire back seat. If...
I have the same issue with my truck. If someone sits in the back seat and sets anything in the middle (i.e. a purse or small bag), I get the warning and it won't go away even after the item has been removed and set on the floorboard. The only way to remove the warning is to buckle the seat...