"Grouping Issue"

AllocationStatus =

VAR CurrentLine = OrderItemData[LINE]

VAR TotalLineDetails = CALCULATE(COUNTROWS(OrderItemData), OrderItemData[LINE] = CurrentLine)

VAR SameDateFlag = OrderItemData[SameDate_Flag]

VAR TotalSameDateFlags = CALCULATE(SUM(OrderItemData[SameDate_Flag]), OrderItemData[LINE] = CurrentLine)

RETURN

IF(TotalSameDateFlags = TotalLineDetails, "F",

IF(TotalSameDateFlags > 0 && TotalSameDateFlags < TotalLineDetails, "P",

IF(TotalSameDateFlags = 0, "N", BLANK())))

The problem is that is not returning any P at all which is not possible.
the below is an example:

now, based on the formula, the entire line 8 should be marked as P, while it has one F and tow N. it looks like the formula is going row by row per detail but then is not applying correctly the status at line level.

How can i get this to work correctly?

thank you