I have been working on a mod for a few days, but the Creation Kit is not changing everything. Namely, clay and iron veins near Lakeview Manor move in the creation kit, but still appear in game. I have tried moving them and deleting them, but nothing works. I don't have this problem with other objects in the area. For the record, my mod.esp file is the active file.

What are the most common causes of this problem? I apologize in advance this has been asked before, but I didn't see it when I searched.

Thanks!