Cumulative sum with filter giving wrong result

Hello Community,

I have a requirement where I need to Calculate the Cummulative from a Column named Actual. 
I have the actual values for multiple sites for every month of Current Fiscal Year (April 2023 - March 2024) 
One of the Site is Hornell as you can see and It has the value as 123 which is the sum of 5 different works (25+10+31+29+28).

And The below is the formula I used for Cummulative Actual.

Cumulative_Actual = 
CALCULATE (
    SUM ( 'TC-Forecast Road Map'[Actual]),
     FILTER (
        ALL ( 'TC-Forecast Road Map' ),
        
        'TC-Forecast Road Map'[Year Month] <= MAX ( 'TC-Forecast Road Map'[Year Month]  )
    )
) 

but when I see the Cummulative value for the Month of April It's giving 129, which is the Combination of Hornell and One more site.  

The cummulative actual is correct when filter is not applied. But when the site filter is applied it is giving wrong output (129 instead of 123).

Please help me with this issue.

Thanks 😊