Well I can go to sleep knowing that I learned something new today... When going into the studio at the end of the day, our old little Cress kiln with a kiln setter was turned off and cooled down. BUT the flip switch wasn't down, the timer hadn't gone off and when we looked, the cone hadn't dropped.
Apparently a temporary power outage will turn a kiln off even after the power returns.
Makes sense, but the obvious isn't obvious until it's obvious... Damn.