Keep in mind a couple things..
1) Shadowtalkers will comment on anything, not just their areas of expertise. They're "real people", and as such have a little knowledge about a lot of things. They also all have a bit of an ego, and they all like talking. Lord knows I'll pipe up on random threads here and on Dumpshock and RPGnet about anything I have a passing interest in, even if I'm not all that knowledgeable about the subject, if I happen to know (Or think I know) a fact or two.
2) Not every Jackpointer knows every other Jackpointer all that well. There's a poster on RPGnet that would start a weekly thread for a TV show I liked. I contributed to that thread every week, and numerous threads this person had posted in. The poster made no secret of the fact that she was female, but her handle was a bit ambiguous (I know a guy who used the same handle on IRC years ago, and knew him IRL, so know he was a he), and it just didn't come up very often. For probably 4 years, I assumed this poster was male, and one day referred to them as "he" and got corrected.
When it comes to the Shadowtalk, never assume anything written is an error on the author's part. It might be. But it might also be a deliberate error. Shadowtalkers are not always right, and they don't always know everything.
Bull