Do they even try to control the trajectory of rocket stages that has gone into orbit after releasing the payload. I doubt so as I've never heard of a ground control station trying to reestablish contact with the rocket stage, reigniting the engine after days/weeks of its orbiting the Earth. Not an easy task as the rocket stage could be tumbling and it would be impossible to stabilize the rocket in the right direction without those vernier thrusters.
This video explains why SpaceX never try to recover the second stage in orbit, the main problem being reigniting the engine.