I missunderstood your original post, but I still bet your answer is how policies can be missunderstood.
Which part of the policy did you edit? user or computer?
Is the object that the change applies to (user or computer) within the OU or subOU the policy applies to?
Did you refresh the correct part of the policy?
Also, some policies (i.e. password policy) must be placed at the domain level.
A+/MCP/MCSE/MCDBA