Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile2D.cs
===================================================================
diff -u -r5760 -r5763
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile2D.cs	(.../SoilProfile2D.cs)	(revision 5760)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SoilProfile2D.cs	(.../SoilProfile2D.cs)	(revision 5763)
@@ -322,7 +322,8 @@
     private static bool IsPointWithinOldSurfaces(Point2D point, IEnumerable<SoilLayer2D> oldSurfaces, double shift, 
                                                  double verticalShift)
     {
-        var shiftedPoint = new Point2D(point.X - shift, point.Z + verticalShift);
+        point.Z += verticalShift;
+        var shiftedPoint = new Point2D(point.X - shift, point.Z);
         foreach (SoilLayer2D oldSurface in oldSurfaces)
         {
             GeometryLoop outerLoop = oldSurface.GeometrySurface.OuterLoop;