I want to rotate a nurbs curve control points. On it there is a plane following de curve. If i tilt the control point for example to 90 degree, it rotates like to 80 degree. And to set it like 90 i have to put it to 140 degree. With bezier curves there's no problem. I put 90 degree to tilt bezier and it tilts exactly 90,

here the .blend file

here the nurbs curves tilt images