I have noticed that the DDNS manager only updates 1 entry every 5 minutes. I also noticed if you restart the the DDNS server, it will only update 1 of the entries on start. I would think all DDNS entries would be checked and updated if needed on the 5 minute check.
This can be reproduced by adding more multiple DDNS entries that require updating and restarting the DDNS server, it will only update 1 entry out of all the DDNS entries listed, then 5 minutes later it will update the next DDNS entry.
