Cisco Wireless :: Set Up Fail Over Capability On Two Active WLC 5508

for some reason some AP's are terminating the association to either one of the controllers for a short period of time. When this happens and the AP re-associates itself with either of the active controllers, it looses the information of what group it previously belonged; and it gets dropped in the default group, broadcasting every single SSID available.
 
What I would like to see happen is that if for some reason an AP terminates association, but restablishes it shortly; it can automatically go to the correct group.
 
Both WLC are running the same version and have the same amount of licenses, they can hold all the AP's one of the WLC came down. Config-wise they are identical except that the groups are named differently but ultimately configured the same. If that is an issue we can change it no problem since it's only the name.