Hi everyone. I bound myinfo.tplinkdns.com to my router and have been using it for about a year. I had to factory reset my router and once a logged into my tplink account i noticed my binds were gone and section was empty. I can also see that my binds are still pingable but to my old IP address. 

When i try and re-enter my binds it says already registered. So are they lost forever to the ether? 

I thought that when i log back into the tplink account in my router my registered DDNS re-populate.

Also does anyone know if the DDNS binds expire?

Thank you for the help