Not sure how to explain this issue, but here it goes. I have Roadway Designer setup with multiple corridors (mainline, intersecting roadways, culvert with ditch). When I draw surfaces and have it display the features and components, everything looks pretty good. All the corridors show up and they are all clipping like I want. When displaying the surfaces, I have it put all that information in one DTM file. When I go to draw sections from surfaces, I have it draw from the Existing Ground DTM and the Proposed DTM that I just created. Once it is finished, I can see that almost all of my mainline corridor looks good, but on a lot of the driveway and intersecting roadway corridors, I can see the point marker labels, but no line work connecting it. On culvert corridor that crosses the mainline, I don't see the point markers or linework. Attached is an example of the error at a drive.