"Add the domain name(s) of the site to your Never Block list"
"If you never signed up for OpenDNS and don't want it filtering your 'net access, simply edit it from your network settings and use your ISP's default settings. Though I am puzzled how it got onto your system, because either you, or the person that administers your network system would have had to set it up (it doesn't come with an installer)."
Quoted from: https://support.opendns.com/entries/21972795-why-are-my-websites-blocked
So, Smallville11, the problem is entirely in the settings of your computer.