"Two sides of the coin"

[Korrd]

I have a problem reaching the dungeons. In fact, i reach them but something weird happens. I enter to a room where the mission arrow goes green, that means that the NPC is in the same room as I. And in the map the NPC i should talk with appear right on the other side of a door that leads to the second part of the dungeons. But when i open that door i end up in the great hall... how can that be? According to the map that door does not lead to the great hall, but to a second room of the dungeons where prisons are...

Anyone has any ideas?

[metamay]

You need to go down a set of stairs, the map isn't 3D so it doesn't show how far above or below you the marker is.