Tricky Concatenate DAX Formula

Hi Experts

I have the following dax formula which works fine to a certain limited. i want to change it so if the YTD,MTD and QTD is selected from the date calculation filter and when NO month is selected then the title should read "total revenue summary".

i cannot see my error...

Title - 1A Product Details = CONCATENATEX( VALUES( 'Date Calculations'[Date Calculation]), 'Date Calculations'[Date Calculation],", ") & " "  
     & IF(HASONEVALUE(DateFilter[Month Short Name]),"",CONCATENATEX (
            VALUES( DateFilter[Month Short Name]),
           DateFilter[Month Short Name],
                ", ")
            &" " & CONCATENATEX( VALUES( DateFilter[Year Nbr]),
                DateFilter[Year Nbr],
            ",")
            & "  Total revenue summary")