Residual Cut/Fill Lines

I have some cut and fill lines that have appeared in my corridor model. I am unable to delete this line and it remains after deleting my template drops in the area.

The first photo shows the area with my corridor and template still there. The photo on the right shows how it looks with the template drops deleted. The "ghost" cut/fill lines run through the entirety of the corridor. Has anyone experienced this and how to to fix it? I am unable to delete it through any methods.