Since I generally just ask questions and never really contribute to the forum I thought I would share a problem and the solution that I have found. Its not what I prefer but at least I will be able to get the job out the door. I have a surface I have been working on that has a corridor and feature lines. When I make a horizantal edit to the feature lines my changes are picked up and added. The problem is the information from the feature line before it was edited is also retained. For instance if I move a feature line 5' south my tin will have the new feature line location and the old one.
What I have found is if I delete all of the break lines from my suface (my feature lines) and then add them back in all of the updates are picked up and the old stuff is gone. The trick I learned was to go into the surface properties under definition and move the breaklines I just re-added up above all of the edits I have made to the surface. In my case I have my corridor in first, then my feature lines, and then any edits I have made to the surface itself.
Thanks for reading,