As I said it isn't EZA's fault but it isn't really my fault either - here is what happened.
A little while ago EZA put some of my articles into problem status due to broken links in articles. The problem turned out to be a server issue where my landing pages were located. My host fixed the server problems and I resubmitted the articles to EZA.
Most of the articles I resubmitted were reapproved and all was well except for 2 articles where EZA found duplicates with no accreditation to me. The articles in question were obviously taken from EZA and republished elsewhere on the Internet without the resource box.
My articles, which are all 100% uniquely my work, were first published on EZA in 2006 so I had no reason to think that resubmitting them would be a problem but I was wrong.
So my advice to anyone about to resubmit articles to EZA for any reason is to check that noone has stolen your article before you do it.