I have an issue like this, 2 of 50 aironet 2602 APs broadcasts 2 unexpected SSIDs (it's not configured by wlc)
I do solve this issue by :
First, I reset AP's configuration from WLC, after rebooting, the AP still broadcast those SSIDs.
then, I revert AP mode from LWAPP to Autonomous, then configure to broadcast an SSID, checked by mobile and laptop, I've just seen only configured SSID, those unexpected SSIDs are disappear, on time, i think reason by OS version by device.
I had downloaded and upgraded to the latest version of LWAPP for this AP. After rebooting, APs are discovered by WLC, still broadcast unexpected SSID.
Have anyone seen this before ? and how to solve this?