Could it be that there is an error in the Pivoting node?
On my PC, the Advanced Settings|Column naming drop-down box shows 3 options, but each of these choices gives the same result (column names will be changed to origcolname+Aggregation method).
In contrast with the groupBy node, setting the different column naming options work as advertised.
I really need to have the same column names after the pivoting. Is there a workaround?