Duskglow Crevice

Duskglow Crevice is a place I passed on the way to find the missing tomes from the College of Winterhold. It is North East of Silverdrift Lair. I wanted to mention that there is a room inside upstairs and looks like someone has been living there. The room is framed around an upright tomb that looks like a doorway. In this room are two wide pillars. When you click the map button it says "Duskglow Crevice (Cleared)". And I assumed I had cleared it. But I discovered a switch just to the left of the staircase as you're coming up. It's hiding on the wall next to a flaming white bowl.