I also had the exact same thing appear as a new account listed.  However, mine is the exact same amount for an old att account that I just had removed 2 weeks ago from EOS/CCA.  It appears now with 284YC00207 as the collector.  When I disputed the account again, it then showed up as EOS/CCA whom had recently removed it.  I disputed the account sttating it was removed in the past for not being verified and also notified tha last collectiona gency asking them what was up.  Still waiting for a reply.  Ughhh