Nope it's a definite bug that as soon as you become the leader of a flight you can't hit a fat bird with an insult. I think it's a bug in the whole of GS2000 not just the AGA version. I just get the rest of the flight to hit my targets and you can still go on. I don't think it's anything to do with rank as i've edited my rank with an editor and you're fine to start off with and then when you get command of a flight it all goes pear shaped.