My OR does it, but it's very slight. Granted I regularly drive 85-95 as well.
I have a CX5 that does it too, so it seems common from manufacturers nowadays.
Pretty sure you have ""
As far as the maps without service goes, On is a good option too. They allow you to download offline maps and it integrates with apple/android to display on the screen.
When did the validation of other people's opinions become a requirement to spend the money that you earned yourself? If you want a particular trim buy it. Too many people are worried about what others say and/or think. Be your own individual and not feed into the hivemind.
Just taking a stab in the dark, but it could be a college/military discount that they like to throw in there that only applies if your eligible.
Or it could be legit. I would call and ask. The dealership that I bought mine from did take 500 right off the top, no questions asked.