After offset/Parallel technique, lines are shorter

Hi guys, 

first, my screenshot of the script

What I want to do is <copy> FilteredLines from arc1 to arc3, so I used 3 techniques. 

1. Line Offset

                                       

2. Line parallel

    same as the offset technique

3. CopyTransform, I got the same length, but the lines didn't snap to the points

          

i'll send the files through Service request