When you respond to someone's message in most forums, there are three symbols that appear under their message on the right side. There is a white thumbs up, a white arrow that points left, and the symbol of a person followed by a plus sign. Pressing the arrow will reprint their message as a quote, so others can see who you are referring to in your reply. That may be what you are doing if it repeats the message above yours. It is optional to push this arrow and it's done only for emphasis. I hope that helps