Issue filtering a FullDate Hierarchy

Hey, thanks for the reply.

My D_FilteredDate is a calculated table from my original date dimension.

My field DateFull is modified as a Date/Time Type.

My Last12Months is a flag calculated in my D_FilteredDate using:

Last12Months = (IF(D_FilteredDate[DateFull].[Date]>EOMONTH(NOW();-13) && D_FilteredDate[DateFull].[Date]<=EOMonth(NOW();-1);1;0))

I'll try and explain the full calculations behind the graph:

We have the numerator:

AffectedArticlesLastTwoMonths = CALCULATE(
SUMX(FILTER(F_Defects_TicketOwner;[Quantity] >= 0); F_Defects_TicketOwner[Quantity]);USERELATIONSHIP(F_Defects_TicketOwner[ContactDateId];D_FilteredDate[DateId]);
DATESBETWEEN(D_FilteredDate[DateFull].[Date];
FIRSTDATE(DATEADD(D_FilteredDate[DateFull].[Date]; -2; MONTH));
LASTDATE(DATEADD(D_FilteredDate[DateFull].[Date]; -2; MONTH))
))

We have the denominator:

ProductsInvoicedPrev12Monthsv3 = CALCULATE (
SUMX(FILTER(F_Sales;[InvoiceQuantity] >=0);[InvoiceQuantity]);
DATESBETWEEN(D_FilteredDate[DateFull].[Date];
FIRSTDATE(DATEADD(D_FilteredDate[DateFull].[Date];-13;MONTH));
LASTDATE(DATEADD(D_FilteredDate[DateFull].[Date];-2;MONTH))
))

The fraction is:

Market Defects = ('F_Defects_TicketOwner'[AffectedArticlesLastMonth]/('F_Sales'[ProductsInvoicedPrev12Monthsv3]/1000000))

In essence the fraction takes two different data ranges and based upon that it makes it's calculation. 

I hope this might shed some more light into my problem. Getting sample data isn't that easy for me to do. If alas it doesn't solve it, i'll put in some extra work into manufacturing some masked data. 

Tyvm in advance.