Solved! Go to Solution.
Hrm, you may want to look into using the Parental controls in the modem to limit things, along with Norton DNS... It's not that the DNS settings are being bypassed, it's that OpenDNS depends on knowing what IP you are behind... Sadly, we aren't given a publicly routable IPv4 address and things such as OpenDNS don't usually work well.
If you know a little bit about FreeBSD and the such... I would urge you to look into setting PFSense + Squid + SquidGuard up on your network as a local firewall/proxy. Some pretty powerful stuff once you get the hang of it.