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Understand, while the two sites mentioned are now properly identified and subject to users' filter settings, there are very likely other sites that were similarly awaiting votes.
That's the nature of the system.
=I'm very curious if anyone (includind you) has the same disappointing results with these sites...=
Your disappointment appears to stem from the fact the sites in question were not properly categorized. That's neither your fault nor, generally spea...
It has been my experience with the MyFi predecessor, LaptopConnect, that AT&T won't let you use an alternate DNS like OpenDNS. I haven't tried it on a MyFi yet.
Afraid not; there's no way for OpenDNS to see the origination IP of the request (and thankfully so). You will need to determine whether your router has such logging capability, or a third-party application that can do it.