Sorter in Column List Loop

Hi,

I have a table with 4 columns and I would like to sort all of them in Ascending order.

So I created a worflow with

ColumnListLoopStart --> Sorter (with FlowVariable    Incllist 0 = CurrentColumnName)  --> LoopEnd(ColumnAppend)

The intermediate results of the loop seems correct but the final result is not sorted in ascending order.

What's wrong?

Thanks in advance

Regards