MULTI BOM QTY COLUMN BLANK WHEN SWITCHING FROM RPT.QTY TO RPY.REL.QTY

When trying to create a multi BOM, my quantity columns are driven by the rpt.qty report parameter.  I can add an assembly to populate a second column quantity by using Repeat Region/Column Model/Rep. That works as intended by creating additional items numbers and putting dashes into the quantities that don't apply to that assembly.

However, when I want to display a bulk item as AR, I use the following relation:

If ASM_MBR_TYPE=="BULK ITEM"
Qty="AR"
Else
qty=rpt_qty
Endif

My thinking was I could right click on the first cell that contains the rpt.qty report parameter and change that to the user defined rpt.rel.qty report parameter.  When I do this, the bulk item displays as AR, like it's supposed to, but all the other quantities are now blank.

This only happens with a multi BOM.  If I switch back and forth between the rpt.qty report parameter and the user defined rpt.rel.qty report parameter in a single column BOM, all the quantities remain.  Only the AR changes from 1 to AR.

Does this not work with a multi BOM?  I can bring in a multi BOM region with the columns preset to rpt.rel.qty with bulk item as AR all the other items as their correct quantity but I can't drive any other columns because that 1st cell needs to be rpt.qty to use the Column Model/Rep function.  As soon as I change it to rpt.qty, all the quantities no longer show.