Password Expiration

Hello all,
I have the password expiration notification script. It is working perfectly,but when
I try to set the script on my DC in secondary domain(We have multiplied domains in single forest)-i get the notifications for first domain.
When i run Get-ADDefaultDomainPasswordPolicy in powershell on DC in secondary domain i get the result of the first domain.
Are DC's found on the same site (we have to sites ).

Any idea why i get the ADDefaultDomainPasswordPolicy of second domain?

Thaks,

Aniri