Right, see bootstrap app renames the logwrapper file and unrooting dont fix the system file, it just prevent you from having access to the system folder. Now you can technically rename it back to what is was suppose to be. But if you are going to go back to factory the best thing to do is to use sbf. See sbf rewrite your system folder back to factory which is how you bought it. And that is why I recommend any one who has tampered with the system folder to do an sbf before returning it back to motorola.