We just ran into similiar problem in our 2011 version. If I create feature lines for my surface in the same default "Site 1" that I create parcels in, the parcel segments will be broken up wherever they intersect with the feature lines I used in developing my surface. This had happened before but did not do much trouble shooting, and rarely had feature lines intersecting boundary lines. This appears to be similiar problem in 2006 post http://forums.autodesk.com/t5/AutoCAD-Civil-3D/par
To avoid this in future I will have to ensure my surface feature lines are in a different named Site than my parcels.
Has anyone come across this in the 2012 and 2013 versions?
To not have the intersection between the lines is necessary to create in different sites.
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