What do you mean by "odd number" ? Because if you're talking about her behavior, that's her normal state so relatively it doesn't classify under "odd" for her.
Well, she is perhaps not brainless, but certainly thoughtless, if the whole OotP spoiler thing is any indication. Of course, she's not the only one. People over at [Bad username in LJ tag] have been raising a stink at the fact that DJs are shamelessly broadcasting spoilers by way of banter.
Anyway, I also only met her the odd number of times and make any conclusions with regard to her brain-state with certainty.