the internal WG should have been tacked shut for the external to work right. If it was not tacked shut or the weld was no good and snapped then that would cause your problem. If they did weld the internal shut or made a bracket to hold it closed then hopefully the removed the weld or bracket so the internal WG will work properly. I am thinking either the internal gate was not welded shut, the weld did not hold, or the bracket that was holding the internal shut failed. But I am not sure what was done. Post pics of the hotside of the turbo if you can, I can tell you if it's ok. Or I can swing by and look at it. pm me