M: "...If so it's not making curves out of them right?"

yes, that second image shows obj after reimporting obj to Modo (it can`t see it as curve) but there is converter inside Modo to convert polygon edges or polylines to Modo Curves.

Thanks for your effort with trying to solve this export/import problem.

Polylines (2- vertex polygons) are exported as n-gons with vertices.

So it`s suppose that my way to import those curves is good but not accurate (different curve shape) as you said before.

Thanks for your time once again.