Whenever I take my 2017 Volt (other cars, too) for any kind of re-programming or updating, practically all of my settings and presets are changed. Dash screens are set with different selections, center screen is blank, in the case of other cars, the power seats are in completely different settings and presets are no longer set, etc. etc. I have to pull over, reset everything, then drive away. Are the technicians just messing with me or does the reprogramming actually change everything?