IMNSHO she didn't admit and correct the mistake — yet. She admitted one mistake and has corrected none, and the one she admitted was IMNSHO not the severe one.
She made several mistakes, of which I'll describe two. One (modestly serious) was to confuse units and compute the wrong number. The second (against my religion) was to publish without sanity-checking. You and I both know she didn't check, because her estimate for the average water use of one building was 20% of the water use of the continent. Any sort of check would uncover that mistake.
We in the rational camp are supposed to behave differently from Alex Jones, and part of that is to check before we publish.
She's "making arrangements with her editor to rectify the situation". If she fixes every reported error, not just one of them, I'll have a lot of respect for her.
