Screen Lockout Policy

I setup a screen lockout policy in Server 2012 as follows:

User Configuration\Policies\Administrative Templates\Control Panel\Personalization\

Enable screen saver = Enabled

Password protect the screen saver = Enabled

Screen saver timeout = Enabled

Number of seconds to wait to enable the screen saver = 300 Seconds

Force specific screen saver = Enabled

Screen saver executable name = X:\Screensaver\scrnsave

The problem is, some computers, including mine which already had a screen saver set for a time is still going by the original time.  

So I originally had mine set for 60 seconds.  After the group policy, I can't change my screen saver settings, it even says 5 minutes.  But it turns on after 60 seconds.  

Any ideas on how to resolve this?

Thanks