It's just a mistake, the good ol' "KASU"s as she used to call them on the online stuff back in the day.
Man, I'm old. *Dial-up internet connection sounds, probably hallucinations*
She just hadn't figured out all the rules and stuff yet. Happens all the time in writing. The Hork-Bajir initially turned all murderous-psycho once in a generation too, that seemed to be scrapped pretty quickly.