here is example that i took from internet (not mine) http://imgur.com/zGAjnuJ that same happened with my RB951Ui-2nd
so there is ssid name "Home-2892" and the other ssid "?" with same mac and etc
if i change channel and the other ssid "?" will follow
what the hell is going on here? any ideas?

Check your wlan interface, there is maybe a virtual

i check in interfaces >> vlan and there is no vlan

i check in interfaces >> vlan and there is no vlan

No, he means a virtual AP interface. Check there.

no it didnt have vlan on it

Reset wireless config and start over. Make sure you have the latest RouterOS and firmware.

already did it (reset wireless config) but not working...
IMO maybe this is happen when wifi client device is too far from MT so client wifi device is trying connect with wifi signal strength that too weak