i think i create the vektor and it connected to "move". than it become two curves which are diffrent in Z axes. than i lofted tham and make a surface. the problem is started after i tried to offset this surface. "Offsetsurface" is not inherited somthing from surface source.
and also i found out that when i use multiple curves by exploding the orginal curves and make surfaces by using this curves i can offset the surfaces (and it also intersects each other like picture).