Yeah, the idea was clear. Two days ago we had a question were what looked like a mistake was actually intended because the algorithm was more complex, so I was making sure 
Here’s the workflow with the Column Group Loop mechanism . I changed the end a little bit to keep the ID column. If the column renaming and resorting doesn’t work with the actual table, you could also:
- Rename them directly after the Loop End
- Extract the column names
- Get Var number and time from them, then sort by number and time
- Reference Column Sorter and Column Append with ID
group_column_loop.knwf (76.5 KB)