Hi dears 
I create surface 2 by EdgeSrf and mirror it to create surface 1 then i match surface 2&1 (curvature continuity-average surface) ,after that i want my isocurve of surface 1&2 have a shape like picture.1 but they have isocurve like picture 2
picture.1
picture.2
Below i upload Rhino(.3dm) file
audi R8.3dm (268.4 KB)
-Thanks