Hi WN, what program was this Text.dxf file exported out from?

It's got another problem in its "knot vector" part of the curve structure in addition to duplicate control points. It has internal knots with a multiplicity greater than the curve degree. It means the curve has "degenerate spans" which make a sort of dead zone around each bezier piece.

That's why it will have some pretty weird behavior if you go in and edit control points on it.

I should be able to remove those degenerate spans automatically as well though.

Thanks,
- Michael