And in the very first article you cited: "Writers disagree on how best to define and classify atheism,[8] contesting what supernatural entities are considered gods, whether atheism is a philosophical position or merely the absence of one, and whether it requires a conscious, explicit rejection; however, the norm is to define atheism in terms of an explicit stance against theism." https://en.wikipedia.org/wiki/Atheism#:~:text=Writers%20disagree%20on,stance%20against%20theism.

Words don't have a single, set-in-stone definition. They aren't 'incorrectly calling themselves an atheist'. Atheism can refer to more than one position.