SYMPTOM:
After executing a report in Developer, a user moves an attribute from grid to page-by and see duplicate attribute elements
CAUSE:
This issue can be caused by define a sort on the attribute in the "Advanced Sorting" option in 'Data' menu. When the attribute moved has an advanced sort condition on it and is moved from grid to page-by, the advanced sort is moved to the page-by tab in the "Advanced Sorting" menu cause the other attribute to not merge it's respective elements.
ACTION:
To resolve the issue, remove the "Advanced Sorting" that is defined on the attribute being moved.
After removing the sort on the attribute being move to page-by:
