In the Ald-Ruhn guild of mages, the stairs leading up from the lower area (dining, forge, etc) have a lowest step that is slighty too big (need to jump to get on the stairs). While this is no big deal for the player character, it makes those stairs impassable for NPCs; by now every single member of this guild chapter is stuck in the dining area with most constantly walking against the lowest step and trying to get out.
Flagged this as "NPCs and Merchants", as there is no component for architecture. =p

#1
could try this esp then,
should hopefully elimenate the need for the player to jump onto the stairs.
esp