In the Many-Worlds Interpretation Theory, every possibility exists in a different universe. That's right, you're not a real accountant, you're a quantum accountant.
Every choice, every action, and every thought creates a new universe. That's why you've been promoted to a middle management position in one reality, but stuck in the 9 to 5 grind in another.
Don't try to wrap your head around it. It's not worth the effort. Just enjoy the ride.