it so happened that there were 2 adjacent levers, horizontal. When i pulled the first one, it opened up a wall, and simultaneously, both levers disappeared... --also i'm not sure if im doing something wrong- but - When deselecting the extra content on the bottom of the start screen, going back to the page will show it is still enabled... continuing forward without looking back (at the selections)- will also, so it seems, include the DLC, as some DLC monsters were clearly on 1st floor (gnome, potato......) -kk.
These are all ingame features, not bugs. Levers disappeared - new scripted rooms DLC - is always selected when you making new game since it's a lame idea to play DoD without expansion if you have one. New mosters at every floor.