Stick around long enough, and you'll be a Preacher before you know it!
It's nothing to get offended by, or even take a second thought about. Catagorizations/Labels like this are quite common on any forum you visit. This forum, since it centers on Christianity, has decided to use labels associated with Christianity, like "new convert", "deacon", "preacher"...... It's simply a way of showing how many times you've posted messages on this board.