Welcome to the forum its a great place to get your questions answered. I have experienced the same problem my inside mount is not the same as my outside mount. I suspect the sales person has never actually tried to move them and was just saying that to bolster the sale.
Jake my sidekick (yellow Lab) 10/04 - 05/20
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho