Cut/Insert columns into an existing Group without breaking up the Group

I am using Excel 2013 and have a bunch of columns in a Group (BG:DZ).
The last two columns are empty.
When I need to cut 2 columns from another section of the same Worksheet (AT:AU) and Insert them into the Group it breaks the group and the moved columns are outside it.

How can I Cut/Insert columns into an existing Group and not have the Group break up?


Cheers

Bump There has go to be a way.