Thanks for the info, @danielsaori.
It surprises me that I never noticed the key before, even though I've been checking Steemd for permissions a couple of times.

I genuinely don't know about the minnowschool thing. I do know that the moment I used Steemconnect to revoke permission, the weird voting behavior stopped. I'll be digging a little further once I'm fully recovered (still feeling a little sick)