The only force, and therefore the only acceleration, when you're in orbit is the force of gravity. And therefore, the only acceleration is towards the center of Earth.
The thing in orbit is already moving with a high enough velocity that it isn't able to get closer to the Earth.
I guess maybe what you're saying, is if you take the velocity vector and apply the acceleration vector over time, that changes the velocity at the same rate as the curve of the Earth.
Either way, there is exactly one force vector (which causes exactly one acceleration vector), not two.
The thing in orbit is already moving with a high enough velocity that it isn't able to get closer to the Earth.
I guess maybe what you're saying, is if you take the velocity vector and apply the acceleration vector over time, that changes the velocity at the same rate as the curve of the Earth.
Either way, there is exactly one force vector (which causes exactly one acceleration vector), not two.