Kickstart installation resulted in `gid` change of httpd/apache to 553 in Red Hat Enterprise Linux 6

Issue

• Installing Red Hat Enterprise Linux 6 using Kickstart profile.
• Have selected Webserver Group for installation.
• The kickstart file contains some third party application compilation in %post script
• After installation completes, the uid of httpd is 48 but gid in not 48, instead its 553

# id apache
uid=48(apache) gid=553(apache) groups=553(apache)