When lot lines and feature lines in the same site cross, they create a split point. This point acquires the elevation of the line last edited—commonly known as the “last one wins” rule. To prevent this interaction, create separate sites for parcels and for the feature lines in a grading plan.
Use the feature line editing commands to edit parcel geometry and parcel elevations. You can access these commands by selecting a parcel and then selecting either the Edit Geometry or Edit Elevations panels to access the commands.