Sounds like you might need some post processor work. Generally, G92 uses the home position switch for location. But I've seen some posts pick it up from other places like "ref points" and such. Even might be hard written in the post if using G92. Look into the post file and 'search' for where it picks up G92s and see what its using for the variables. Another possibility is, are you using "stock setup"? On the property pages for you Machine Definition, if "display" is switched on, the values from this setting could be affecting your output as well.