When you create an Ap-Group you are defined that SSID is going to belong to the AP-Group.I don't understand because they in the AP spread all the SSID that they is definite in the Lan controller, I understand that only should publish the SSIS that they are defined when you define the AP-Group.
Does any form exist of that the AP it only publish the SSID that they is definite in their AP-Group?
Thats is not the main purpose of AP group I believe and I believe what you see is expected.
The whole purpose of AP Group vlan is that same ssid can be mapped to multiple vlans and then mapped to different ap groups which is further mapped to APs and when you roam to different APs which are mapped to different AP groups depending upon which AP you are associated you will get assigned to that vlan as the SSID remain same but mapped to dfferent vlans.
I believe what you should configure is WLAN Override feature where you can select which AP should advertise which WLANS and you can specify it per radio also.
Have a look at this link
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