When i add an override from within a hostgroup the contents change after submitting. However, when the same change is made from within the puppet class section, the change is correct after submitting.

Here is the yaml that is being added and how it looks when submitting from the puppet class directly:

optional:
  name: RH-optional
  baseurl: http://yum-corp.example.com/rh6-x86_64/RPMS.optional/
  descr: RedHat 6 optional repo
  gpgkey: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
base:
  name: RH-base
  baseurl: http://yum-corp.example.com/rh6-x86_64/RPMS.os/
  descr: RedHat 6 base repo
  gpgkey: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
updates:
  name: RH-updates
  baseurl: http://yum-corp.example.com/rh6-x86_64/RPMS.updates/
  descr: RedHat 6 updates repo
  gpgkey: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
pupdeps:
  name: RH-pupdeps
  baseurl: http://yum-corp.example.com/puppet_rh6-x86_64/RPMS.dependencies/
  descr: RedHat 6 Puppet Dependencies repo
  gpgcheck: '0'
pupproducts:
  name: RH-pupproducts
  baseurl: http://yum-corp.example.com/puppet_rh6-x86_64/RPMS.products/
  descr: RedHat 6 Puppet Products repo
  gpgcheck: '0'

Here is how it looks after submitting to the override from within the hostgroup:

--- ! "optional:\r\n  name: RH-optional\r\n  baseurl: http://yum-corp.example.com/rh6-x86_64/RPMS.optional/\r\n
  \ descr: RedHat 6 optional repo\r\n  gpgkey: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release\r\nbase:\r\n
  \ name: RH-base\r\n  baseurl: http://yum-corp.example.com/rh6-x86_64/RPMS.os/\r\n
  \ descr: RedHat 6 base repo\r\n  gpgkey: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release\r\nupdates:\r\n
  \ name: RH-updates\r\n  baseurl: http://yum-corp.example.com/rh6-x86_64/RPMS.updates/\r\n
  \ descr: RedHat 6 updates repo\r\n  gpgkey: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release\r\npupdeps:\r\n
  \ name: RH-pupdeps\r\n  baseurl: http://yum-corp.example.com/puppet_rh6-x86_64/RPMS.dependencies/\r\n
  \ descr: RedHat 6 Puppet Dependencies repo\r\n  gpgcheck: '0'\r\npupproducts:\r\n
  \ name: RH-pupproducts\r\n  baseurl: http://yum-corp.example.com/puppet_rh6-x86_64/RPMS.products/\r\n
  \ descr: RedHat 6 Puppet Products repo\r\n  gpgcheck: '0'\r\n\r\n...\r\n"