Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

Near eastern transition in Palace District there's an "infinite door".

Meaning there are five or six doors on the same spot, and they can be opened on after another, cartoon style.

Funny enough that's a surprisingly easy mistake to make in the tool set, doors a rather funny things. It's a hair trigger, it does not always look like you added one, it has a heck of a time sticking, and can often just snap to a location one hundred feet above the door frame.
Or... perhaps the Dukes are just messing with the peasants, sounds like something Lord Belt might do.

A few months ago half the areas doors vanished. I wonder if that is where they went? Gotta love the Toolset!

This is still an issue, but obviously low priority.

Maybe it could be a plot thing... 'go see the house of six doors'...

I'll take a look-see at it.