cannot change owner and group of files

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http://forums.fedoraforum.org – I have a user account that has administrative privileges. testing out some devices, i decided to add the user to root, adm, d-bus etc groups. after that, whenever i create any file, with or without superuser, the files all belong to root and group root. whenever i try to change the ownership, even with verbose own, i get the report that the ownership has been changed but whenever i list the files again, i still get the same report, owner root , group root. i really have to resolve this out. By the way, i have tried removing the user from those groups using the gui but did not succeed. i chec (HowTos)