Russell,

Since Voipo does not use SRV records anymore, I don't think the ATA is initiating the traffic to these SIP servers. I wonder why the other SIP servers are sending packets to your router unless they think that you are registered with that server.

You might want to shutdown your router and ATA (and probably your softphone too) for 5-10 minutes until the connections clear in the "Devices" page and then see if you are getting the packets from all the SIP servers.