You can submit a suggestion here. http://www.tp-link.com/en/Support/contact/

Hi George, what's the IP address of your seagate central? Is it assigned manually or by DHCP? Can you ping its IP address successfully on your PC in the same network?

Did you try Ada's suggestion? "Any friends using android phones? You'd better give a try." when I reconnect my phone to Wifi notifications are not coming until I push the button Save in Wireless...

The rate between powerline adapters cannot be adjusted...

It is out of my capability. Suggest reporting it here. http://www.tp-link.com/en/support/contact/

Like airprint? I know some TP-LINK devices have beta firmware to solve such a issue. You may contact them to confirm. http://www.tp-link.com/en/support/contact/