I must admit I never ran across a FQLN, having only started with Aruba about 4 years ago. I'm now working with AirPlay and under Shared Locations: the FQLNs are included in the popup list and most are wrong and they make the list much longer than it already is.
So, how were these FQLNs created in the first place? Can I edit them somehow to correct them? Finally, is there a way I can exclude them from the Shared Locations: popup list when adding/sharing AirGroup Devices?