The mere presence of mirrors for a site can affect its listing. It creates a presumption that some kind of deception is going on ("An honest man has the same name on all his credit cards."): we tend to check everything more carefully, and the benefit of the doubt skips right over to the NEXT fellow in line. And if we can't tell which mirror is real, we may end up not listing the site at all (because each mirror keeps all other mirrors from having unique content!)
All of that is true whether or not anyone ever submitted more than one of the mirrors.
And if it doesn't even matter WHETHER the site was submitted, it really can't matter WHO (whether the webmaster or agent, or someone else) submitted a site. And it doesn't really matter WHY they did it -- if it helps us, that's great; if it doesn't, that's a part of life too.
The important point, I think, is to focus on reality. The submittal is just a link--editors could do everything we do without receiving a single submittal--so forget about it. The website is what matters.
