I am somewhat confused by your request as well. I just tried, and in this situation, I get one of two results:
1) If I am on the target channel, I get "* sat: You're not channel operator" shown in the window of that channel.
2) If I'm not on the target channel, I get "#channel You're not channel operator" in the status window.
In the first case, the channel parameter is omitted because the window it is shown in, is the actual target channel. In the second case, the channel parameter is shown.
With this as a basis, could you please elaborate on what case you want changed and why? (And of course, if mIRC ever showed the message without the channel name in the status window, that would be a bug.)
