W van Cothen wrote:
Why do I sometimes see my own name [in parentheses] appear when I hit the
Enter key? I don't understand what is happening there.

Yeah, there's a switch somewhere in the Options maze, which tells the
app to automatically insert your name into the text when you reply or
forward and make any changes to the original message. It can be turned
off. Drives me mental, that one.

I can't tell you exactly where it is, but I know I've seen it.