Atomic orbitals

[Siggy_G]

I'm wondering, since electrons orbit the nucleus in a spherical manner, why do they have a definite pole? If an electron orbits the nuclues in a circular/disc manner, then it makes sense that it induces a magnetic field perpendicular to the orbit - as typically explained in magnetostatics. But electrons don't orbit in a circular manner, they are thought to be orbiting within energy shells, i.e. spheically, in which case the poles would be randomly alligned at any given time. When multiple electrons orbit around the nucleus in this way, their induced magnetic fields would more or less cancel eachother out.

What is the true explanation for atoms having magnetic poles, which coincides with the science of atomic orbitals?

When atoms respond to an external and static magnetic field, it means that the electrons' orbit is forced into a disc shape (so that the atomic pole alligns with the external magnetic field) - is this observed?

( Related: http://en.wikipedia.org/wiki/Atomic_orb ... f_orbitals )