Before going further ,I would like to confirm one more question:
it is not allowed to reset the password from the ADUC, or it is now allowed to change the password on the workstation by pressing Ctrl+Alt+Del)?
From the test i did in my lab, no matter how long you configured the minimum password age, it will not effect you reset the password from the ADUC .You can reset the password whenever you want.
But it will effect the time you change the password when you logon to the workstation ,the minimum password age (counted from the time Password last set) should pass at least the time you set ,then you can change it.
One more question: the result you provided below was get from the net user command, right?
Based on my experience, the net user command can only get the group policy result , can't get the result from fgpp.
So your domain policy also configure the minimum password age to one day, you can check that on the default domain policy GPO.
Note: sorry for the unclear words, "age for the user's account",i mean the age for the password.