Yeah. I´ve done this and actually the extenders on different SSIDs work fine. But all network with one SSID, there is conflict. I´ve read in another threads that eventually this could be solved...

Model : Hardware Version : Firmware Version : ISP : Hi guys I used to have on my setup a router (D-Link 809) with one extender TP Link 850RE. All worked fine and smooth. Then I added one more...