[CentOS] UID GID Problems.....

Hoping someone can help me fix something that I apparently messed up, i have the issue that when I untar a file as root the uid and gid that get set are not roots'. I had change a user uid and gid to 1000 via usermo -u etc.... but somehow it appears to have effected the root user. When I touch files as root the correct uid and gid are root, however when untaring an archive the directory and files are uid and gid =1000. Hope someone can point me in the right direction....oh yea, running centos 5.4, and when I run the command id = uid=0, gid=0, etc,,,,all appear to be right for root....Thanks in advance.