I'm creating two new caves and have spent time editing both the interior and exterior cells. Yesterday, while I was working on one of my interior cells, I noticed some objects off in the distant void. When I went closer to them, I discovered that they were two huge clusters of clouds (from the sky outside, which I hadn't even touched!), a bridge I had placed outside my cave, and a couple of rocks and trees. When I went to the exterior cell, these items were missing.
It happened again with my second cave, which is up near the Throat of the World. One of the hovering dragons from the cell outside mysteriously appeared off in the void in the interior cell. I never once even clicked on any of them while working on the exterior cell.
Is this a bug, or is it something I did? I can't imagine how it could be the latter, as I'm very careful about what I'm doing and don't do just click on things willy-nilly. It's very frustrating