...but I have some issues printing the curves, only the last one has the correct number of plots.
You mean points ?
Yeah of course... sorry for the mistake.

For example I ask 20 points per curve and I have 3 curves. The last curve I created will print 20 points, the second will print 10 and the first will print less.
So I want 20 points on each curve.
Each curve is really attached to the plot with the same number of points, but doesn't show those points (except the last curve created).