Measure Does Not work Properly.

Hi Everyone, 

Above is the sample data of the timesheet.

I am getting correct results when i have a single pay date selected but when i add the same measure in matrix and add pay date in the column, i am not getting correct results I am not sure why.

1 st measure to calculate Hours Worked

Worked Hours= sum('Table A'[Worked Hours])

2nd measure to calculate contract hours as Contract hours is done for fortnight

Contract Hours = 
    SUMX(
        SUMMARIZE(
            'Table A', 
            'Table A'[Full Name], 
            "CONTRACT", max('Table A'[Contract Hours])
        ), 
        [CONTRACT]
    )

 3 rd to calculate difference

Difference= [Worked Hours]-[Contract Hours]

I am checking the variance of the hours so in the matrix i am doing Difference is less than 0 in the filter. 

Please can someone help me with this

Thanks verymuch !!