Curves create knots

hello guys so i isotrimmed a surface and when i wanted create lines between each 2 sides of each rectangle my lines create knots,im a beginner to grasshopper please bear with me,thanks (33.9 KB)

Is this what you’re looking for?

YES THANK YOU SO MUCH MAN ! , i just want to understand whats the problem

because when i tried to make something a bit more complicated i ran into the same problem

i made a another surface iso trimmed it,deconstructed brep and selected the longer edges of one brep and created a nurbs surface from the two edges that i modified with graphmapper and grafted the list item but i ran into this problem (37.4 KB)

The two opposite edge of your surface has different directions. So you need to Flip or Reverse one of them.

There seems to be a problem with your attached file, please upload it again.

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thanks mate,i sent you another file with another pic if u can can check them out that would be wonderful