I've submitted corrections to Rand McNally a few times, and they've only changed one of them.
The one they've changed is that US-65 from Springfield to Branson, MO, used to be shown as a freeway for its entire length; this was the correction for which I did not submit a reference other than a Google snapshot.
US-45 from Harrisburg to El Dorado, IL, has been four lanes since about 2007, but is still shown as two lanes in Rand McNally. I even submitted a link to the construction project, but to no avail.
I've told them three times now, I think, that the entire state of Chihuahua changed time zones in 1998; this is well documented. It's still wrong in the atlas. This actually affected my travel plans once, as I was crossing the border at El Paso and then taking the bus most of the way into Chihuahua. Fortunately, it worked to my advantage and I gained an hour of travel; if it had worked the other way, I wouldn't have gotten to my destination that night.
I have given up the idea that Rand McNally cares their information is incorrect.