sounds like the finance guy is trying to fuck you. I wouldn't put it past them. when I was in college one of my room mates bought a car. they were charging him like 8%. a few days later another friend called me and asked "hey did travis just buy a new car?" "yeah, how do you know?" "well I work at the dealership, and I was doing some paperwork and saw his name. does he know he got approved for 5.9% and they are charging him 8%. you never heard this from me but he needs to have that shit straightened out"
my friend at fmc wouldn't be able to do anything, they/he deals directly with the dealerships. I believe he's the one that actually finances the purchases of the cars from the factory to the dealerships, so he doesn't deal with customers. he can get you an x-plan price, that's about it. right now you can get a-plan (which is better than x-plan) from the dealership.
if I were you I would have gone to a different dealership. give dub miller a try.