Incorrect values in pivot table from Tabular model

Hi

I tried for several days to fix this but to no avail so appreciate all/any help!

I have a model built in SSAS Tabular.

When checking my metric in Excel pivot table, it gives the wrong value in the subtotal, but only for a certain condition.

Here's the logic for "Rtn_qty_adjust":

If Rtn_qty > UCL, THEN Rtn_qty_avg ELSE Rtn_qty

Note "UCL" = Upper Control Limit

As you can see from the image, the subtotals are correct anywhere that Rtn_qty < UCL,  but where Rtn_qty > UCL, then they are wrong.

Here is the DAX I have for "Rtn_qty_adjust":

:=
IF(COUNTROWS(VALUES(dates[incr_base_date])) =1, [Rtn_qty_adj_1]
,
SUMX
(
SUMMARIZE(drct_excg, dates[incr_base_date], "rtns", [Rtn_qty_1sd_adj_prd] ),
[rtns]
)
)

this relies on the measure "Rtn_qty_adj_1" per below

:=

Rtn_qty_adj_1:= IF( [Rtn_qty] > [UCL], [rtn_qty_avg], [Rtn_qty] )

thanks!!!!