1. Right-click on the applicable Group Header section
  2. Select Change Group
  3. Click on the Named Group drop-down on the Specified Order tab
  4. Compare the value in the Named Group drop-down to the value in the list
  5. Change the entry in Specified Order to match the incoming record value
If the above steps do no resolve this issue, please try the following:
  1. Click on Report, Group Sort Expert
  2. Change the drop-down value For this Group Sort to No Sort
  3. Click OK