In Civil3D 2008 (SP2) I have created a surface using grading groups and feature lines. Everything daylighted to exist ground perfectly. Then the design was revised and I needed to move and raise the surface. It re-drew the contours at the correct elevation, but seemed to retain the original boundary of the first daylight line. Now I don't know how to get the new contours to tie out to exist ground. Any idea what I'm doing wrong or is a default setting I need to change?