“Common misnomers about X”

I think this is where the word is confused with “misconceptions,” because the person goes on to explain what qualities X does not have.

“That’s a misnomer. The President has always supported the troops.”

I think this is an attempt to use it as a synonym for lie.

Note that misnomer is only slightly ahead of “flush out” for strangely-used term of the week. Using “flush out the details” instead of “flesh out the details” is a result of a hunting culture, rather than a plumbing culture, I think. “Flush out” is a metaphor presumes that detail is hiding in the bushes, like game birds. “Flesh out” is some ancient term for fattening something up.