Not meaning to sound that I can't make a mistake, but I've been working on cars for 40 years, so, yeah, they were correctly installed. It's pretty much a no-brainer. I guess the tire tread noise transmitted too much for my liking.
Like I said, being older, I like like the creature comforts a little more than I used to. I replaced the stock bushings with polyureathane and that increased the stiffness without the noise.