Drill up not enabled to go to top level

[kgcognos]

We set up a relative time category QTD.

When I select QTD as column. It shows QTD as 1 column then Total as 2nd column.
Then, when I drill down QTD, it displays October, November and December then total QTD columns.
The problem is, I cannot drill up on the month again to show QTD and Total columns only.

Is there a way to fix this?

Thank you in advance.