Using key from fact and dim gives different results

[Anonymous]

I have this measure:

VAR V1=
ADDCOLUMNS(
VALUES (Fact[Key_Customer] ), 
"C1",             
CALCULATE([RevenueYTD],SAMEPERIODLASTYEAR('Date'[Date]),REMOVEFILTERS(Fact[Segment],Fact[Type])
)  
)

RETURN SUMX(V1, [C1])

And I wanted to change it to:

VAR V1=
ADDCOLUMNS(
VALUES (Customer[Key_Customer] ), 
"C1",             
CALCULATE([RevenueYTD],SAMEPERIODLASTYEAR('Date'[Date]),REMOVEFILTERS(Fact[Segment],Fact[Type])
)  
)

RETURN SUMX(V1, [C1])

But returns wrong totals, why is this? What difference does it make? Customer[Key_Customer] and Fact[Key_Customer] are the same…

To give some context:

(In the Customers table I have Customers with the exact same names, but different Key_Customer, they are in fact different customers, they just happen to have the same name).

My problem is that I have a Filter in the report as: Customer[Name]… and Power BI groups by name, ignoring the Key.

My goal is to change the code to have: VALUES (Customer[Key_Customer] )

[amitchandak]

@Anonymous , Plot the first with Fact Key_customer

and second, one customer Key_customer, are you still seeing the same diff? 

Make sure customer as all the customer in fact.