Activating EAX15 disables SSID

After setting up my EAX15 many times, every time I notice that the SSID's I configured to be extended, will not provide internet access anymore for other device (like my PC). It seems to be exclusively used for the extender. Am I missing setting?

This is mainly the reason why I take it out again since I don't feel like reconfiguring other wireless devices in the house to not use the specific SSID.