How to avoid creation of multiple history step after using a script.

I have created small scripts to increment/decrement Exposure and Local Exposure.

This is one of them.

local LrDevelopController = import "LrDevelopController"
local mode = LrDevelopController.increment ("Exposure2012")

The scripts works fine BUT if I move a different slider before the changes in exposure Exposure are recorded in history I end up creating a multitude of unwanted steps for naught for the other setting/parameter I changed.

Steps I do (video shows the issue)

1. I use the script (I assigned it to a KBC on my Wacom Tough Ring for fast use)

2. Before the "Exposure + X" step is recorded I click and hold another slider and move it left right.

 BUT I do not let it go.

Result: A multitude of steps are added, each single movement of the other slider is recorded as a new history step even if effectively I dind't let go of the slider so LrC should still tracking the setting but not write the changes in history.

I tired to fix this issue by adding LrDevelopController.startTracking ("Expsure2012") to the script but without success.

I am definitely making some mistake here,  I am missing the necessary line in the script to prevent this from happening.  

Any help would be appreciated.