problem with rotation with branches

I am writing because I am having a problem I am unable to solve. It might be something silly but I don´t find the solution.

I woul like to rotate a set of rectangles to make an elevation of a façade and I am using the Transform.Rotate function ("set of panels 1" in the image I am attaching). The thing is I try the same code for only one rectangle ("panel 2") to find out what goes wrong and ... it works!, as you can see from the equalty of the centroids. I don´t understand what is going on! Any help?

I am posting both "code 1" and "code 2" and a screenshot.

CODE 1

private void RunScript(DataTree<Rectangle3d> rec, DataTree<Point3d> centr, DataTree<Vector3d> vec, ref object A)
  {
    DataTree<Rectangle3d> elevation = new DataTree<Rectangle3d>();

    double angleRot = Math.PI / 2;
    Point3d ptoRot = new Point3d();

    for(int pathC = 0; pathC < rec.BranchCount - 1; pathC++)
    {
      for(int itemC = 0; itemC < rec.Branch(pathC).Count; itemC++)
      {
        GH_Path ruta = new GH_Path(rec.Path(pathC));
        ptoRot = rec.Branch(pathC)[0].Corner(0);
        rec.Branch(pathC)[itemC].Transform(Transform.Rotation(angleRot, Vector3d.ZAxis, ptoRot));
        elevation.Add(rec.Branch(pathC)[itemC], ruta);
      }
    }

    A = elevation;
  }

CODE 2

private void RunScript(Rectangle3d x, ref object A)
  {
    x.Transform(Transform.Rotation(Math.PI / 2, Vector3d.ZAxis, x.Corner(0)));
    A = x;
  }

Thanks in advance.

Cheers!