Five counts is pretty close to the physical limits of the actuator when its retracted. I have mine set to where the actuator would have to run west about an inch or so before hitting the physical stop. At only five counts away from fully retracted, it could reach the physical limit before reaching 125 West if the V-Box or reed switch would happen to miscount.
Installing a different actuator arm could throw it off that much or more. When you get the ASC-1, you'll have to start from scratch storing the new limits and satellite positions anyway. I've never started out storing satellite positions in the middle of the arc, always on the lowest western satellite, putting them in order as I go after setting the limits. Don't forget to set your physical limit on the eastern end of the arc, allowing a little travel beyond the stored eastern limit.
You can always change both limits if for some reason you need to do so later.