It wasn't the Chief Judge... it was Deputy Chief Judge Herriman, and indeed this was referenced later, and a new deputy followed. (In fact, if this was during Volt's reign, wasn't that when Hershey became deputy?) Either way, the crystals the Dark Judges ended up in at the story's conclusion are the ones they remain in to this day (apart from Death. They were referenced at the start of 'My Name Is Death'.)
I'm not sure everyone agrees, but as far as I'm concerned, they're all canon.