The value isn't put back to 00 to hide anything. But it may well be that modifying some bit, or combination of bits, has other effects (such as internal state changes for instance) that means that reverting the configuration doesn't in of itself restore the original behaviour. We don't have the specifications or a build guide to work against.
VCDS should know that the module is Jetta-specific, unless it's not Jetta-specific, in which case the answer is... I don't know. I would have thought the modules (or software versions at least) would not be shared between vehicle types, but who knows. Again, Ross-tech is your best bet. You can try any of the configurations that you think may yield the desired results. As I said before, I don't think it's likely to do any damage at all, but I can't promise anything.