kamelek, What could be happening here is that the configuration changes that you are making on the controller contain something that causes the 6532 to lose its ability to stay connected to the controller.
In this case, after the AP receives the changes that are pushed out from the controller, it implements them. If one of the changes then breaks the APs ability to stay connected to the controller, the AP will try several times to re-connect, but once it realizes that it can't, it will automatically revert back to the last known configuration that allowed it to connect to the controller (AP will also reboot). This could possibly be why you see the AP receive its changes...and then lose them.
Secondly, regarding the 'overrides' - The AP profile is the master configuration for the AP. The device level configuration is where you make configuration changes that DEVIATE from the master AP Profile. This is where you would make changes for things like static IP addresses or hostnames....values that you don't want to be duplicated to EVERY AP, right?
What might be happening is that you make a change to the AP Profile but then the AP has an override setting on the controller that 'overrides' the Profile setting.
This would NOT explain though if you are seeing the changes briefly on the AP but then they go away. But, this topic *is* extremely important to understand from a controller management perspective.