Binding BoundingSpheres to a world matrix in XNA

Question

I made a program that loads the locations of items on the scene from a file like this:

using (StreamReader sr = new StreamReader(OpenFileDialog1.FileName))
                    {
                        String line;
                        while ((line = sr.ReadLine()) != null)
                        {
                            red = line.Split(',');                            
                            model = row[0];
                            x = row[1];
                            y = row[2];
                            z = row[3];
                            elements.Add(Convert.ToInt32(model));
                            data.Add(new Vector3(Convert.ToSingle(x), Convert.ToSingle(y), Convert.ToSingle(z)));                                                                         
                            sfepheres.Add(new BoundingSphere(new Vector3(Convert.ToSingle(x), Convert.ToSingle(y), Convert.ToSingle(z)), 1f));                                              
                        }

I also have a list of BoundingSpheres (called spheres) that adds a new bounding sphere for each line from the file. In this program I have one item (a simple box) that moves (it has its world matrix called matrixBox), and other items are static entire time (there is a world matrix that holds those elements called simply world). The problem i that when I move the box, bounding spheres move with it. So how can I bind all BoundingSpheres (except the one corresponding to the box) to the static world matrix so that they stay in their place when the box moves?

Answer 1

Comment as answer:

In that case, how does your ray picker check against the bounding spheres? My thought is that, if worldBox is the only thing you're changing, it must co-incide somewhere with the picker algorithm. Two possible problems: 1) does the ray picker use the worldBox matrix? 2) If not, are world and worldBox created at the same time? Have you inadvertently got two references to the same matrix?