Hmm I'm guilty of the same mistake, seems like I read the metadata too quickly, where the author is mentioned as "harthur" and appears in the url as well as near the article's title and date, overlooking the blog's title itself where "Heather" appears. Somehow I read "harthur" as being a single word for a name derived from "arthur" (instead of, I now reckon, a concatenation of initial and last name), either as an online pseudonym or a spelling I didn't know about; and thus mistakenly inferred the author was a man.
Oh, the traps we can fall into.