Molding Line Below Surface ?

[D270]

OK I'm stumped. When I draw a molding line on an exterior wall it disappears below the surface of the wall. If I use the delete surface tool to delete the wall surface material ...... there it is. What am I doing wrong? I have used this tool many times before with no problems. I am using CA 10.08. BTW this is my first post, but this forum has been a huge help over my past year of learning CA. -Dave