Every editor can and is encouraged to add new sites themselves, if they know the URL and it's a site with unique content. The editor of that category could easily add, review, and list your site suggestion himself if it meets our Guidelines, so, I seriously doubt that the person you were in contact with is an editor.
There is no reason for an editor to tell you to submit your suggestion repeatedly. In fact, he should be telling you to submit it only once, he would be doing you a disservice by giving you that false advice.