As a number of us have found out over and over again, this is the norm rather than the exception. RV sales folk are earning themselves a very poor reputation.
I personally think it is the sales people themselves and not the dealership. If the owner of the dealership knew what his sales staff was telling potential customers, I believe they would make some changes.
But the pressure to make sales and in turn commissions is too great.
How many new folks have we met right here on SOC who got sold a bill of goods by a salesman and now have a TT that is too heavy for their TV?
I had a sales guy tell me that my duallie (rated to tow 12,400# max) would pull a 16,000# GVWR fiver. I explained to him in no uncertain terms that he was not taking into account "stuff" (clothing, propane, water, food, etc.) and a bit of a safety margin. He tried to say that no one carries 1,500# or more of stuff. At that point, I just started listing how much things weigh. He was not happy.
There were several other couples in the trailer at the time as this was in the middle of a large RV show. Their eyes were wide open. I finally told him that he was making unsafe recommendations and left.