Ha ha, yeah. I just found that out. I'm such a loser.
It wasn't Paranoia, though; it was the puppet master guy. I was soooo certain I'd got them all. But thank you. I know I'm way behind the curve on getting this game (who else plays DoS for the first time in 2009? lol)
So yeah. Let this thread serve as a lesson for anyone else who thought they were stuck in Julius mode. What I was really worried about was that I beat the flame demon before Paranoia, and that doing it in that order somehow screwed me out of beating the game. Like it would in Soma mode.
Happened with me too- same boss as well. Got fed up of dieing to it, so explored the rest of the castle and level up, but as a result forgot about it entirely. The beauty and curse of a "truly" non-linear game.