Once I connect the Edison to Wifi with the configure_edison --setup command it connects automatically every time I power the board. If I use the command ifconfig right after boot I get the same output you are getting after entering those commands. I suggest you to try with the following command: systemctl enable wpa_supplicant. This command should initialize the wpa_supplicant service at boot, which is the service in charge of the wireless connection. Let me know if this works.
Thank you very very much. Finally, I found the solution of my issue. It was not about the wpa_supplicant as you suggested. I had to change the usb0 ip adress according to Re: SSH to my edison?! Entry no. 25 was the solution! I'm very happy now, although I cannot understand that Intel does not fix that issue while so many user have it.
Thanks again for your effort!