I asked him why he signs his name twice. He said, "It's just something I started doing, and fell into the habit of, I guess. When you send messages, the game automatically signs your name for you, but there are times when a little more is either needed or desired. It adds something (to me, at least) more personal, adds emphasis to the character itself, IMHO."
I can understand what he's thinking.
It's like when you type a letter, and then sign above your typed name and position. He thinks of the auto-generated sig as more of a "seal", I guess, that his scribe put on, and then he "signs" it himself.
Pity we can't use different fonts in the messaging to make that more real looking - suggest to him that he use italics or bold.