Torque Constructor has always hated spheres. I don't know you could even place them without it crashing.
Use quark or hammer to do spheres. Or better yet try to avoid them completely. Your spheres would look a lot better as .dts shapes. If you want better collision then model some cubes you want the size of the spheres to be in constructor and then give them the null texture. Put the .dts spheres inside them. People always seem to have problems with vehicles driving through the spheres or people shooting through them or being able to build through them, you're better off having people bump into a weird invisible cube than trying to mess around with complicated brushes to keep people from building inside and flying through your pretty spheres.
