Question about IF() & filter context, Maybe~

Hi community
I’m sorry .
In fact, I don’t know how to describe my question. :smileysad:
So ,let me use the screenshot to ask my question ~

1. Relationship

2.Measure (In these measures ,I did not use the calendar table.)

SumSalesValue = SUM('Order'[SalesValue])

2011SalesValue = CALCULATE([SumSalesValue],FILTER(‘Order’,YEAR(‘Order’[OrderDate]) = 2011 ))

2012SalesValue = CALCULATE([SumSalesValue],FILTER(‘Order’,YEAR(‘Order’[OrderDate]) = 2012 ))


Trend2011v2012 = 
IF( [2011SalesValue] <= 0 && [2012SalesValue] >  0 , “New”,
    IF( [2011SalesValue] > 0  && [2012SalesValue] <= 0 , “Lost”,
        IF( [2011SalesValue] > 0  && [2012SalesValue] > 0  &&  [2011SalesValue] > [2012SalesValue] , “DEC”,
            IF( [2011SalesValue] > 0  && [2012SalesValue] > 0  &&  ([2011SalesValue] < [2012SalesValue]) , “INC” , “STD “)
            )
        )
    )

3. Visual Table (Yes, the screenshot as below is my question .)
Why is there a Cartesian product in this table?