[Mr.ac]

Well....
The "rev redline" is just a glorified shift light. You can set at any rev for shits and giggles.
My guess, seems like you bought your car used right? If so I'm betting it has some type of shitty tune before.

That's the problem with shitty tunes, they are linked to some weird dash controls. One has the cruise control to switch tune maps. Great if you know it's there, sucks donkey **** for the next owner that doesn't know.

As far as the swaying, check your rear tire's pressure. Having 10psi more or less on one wheel will make it act weird.