I don't think that it was a production error. Maybe they were still stuck on the whole "Season 1, harsh dead end" thing.
First off, welcome to the Forum, IronMask! Hopefully you'll find that our Legends information is top notch and our other Members are the best in friendliness.
Secondly, I've been thinking that My original theory maybe isn't all that accurate. However, the only thing that I have against changing it is the fact that was the
only episode to have had the Season 2 Throne Room guard emerge from behind the double doors! This makes me believe that the guard emerging from the double doors somehow led to the Run being screwed up. Can anybody else think of an alternative reason for why the guards point of emergence was moved away from the double doors to the camera-left side of the room?