Exactly. AggregateCells perform a visual aggregation by referring to other cells, so their position in the visualization affect the results, which could or could not be important, depending on the calculation being performed. Pre-sorting the table prior to loading it in memory will not help. Ideally we should prevent report consumers from changing the sort order, which cannot be done currently. I'll add a feature request for that. Thank you, @touwen_k ! ... View more