When I export it I would just go file>export>collada to my desktop and then from there convert it back to a gr2 file with your tool. I do delete the camera and lamp also. All of the meshes are doing this after I export them, even if I don't do anything to what I import. I am using version 2.76 of Blender so I don't know if that has something to do with it since I saw that some people in this post are using older versions.
