Okey, I'll have a go then
Deccan
1) Thats what rumours says. Shouldn't take more than 5 minutes to test though
2/3) Launced fighters (both from planets and carriers) follow their own strategies. I have lost games (or at least crucial battles) when I had forgot to set strategy for the fighters and they reverted to "optimal". They would try to go straight through the enemy fleet, without firing their weapons, while looking for some juicy target at the back.
I have no idea what happens if you make a fleet of fighters and tell them to stay in formation (I assume they would follow the fleet order), and I have also no idea why you would want to do such a thing.
4) Here I am guessing again, but the "active" set of strategies ought to be the right one. For carriers that stay with the fleet; its the fleet strategy, for carriers that breaks; its the ships strategy. The fighters strategy should never come in play. Once again, this is very easy to test
Never noticed the bug in the simulator. I always make a testgame for any serious testing, as I can include training and racial bonuses in the test.
se5a:
The mixing of fighters in the same stack should be counted a blessing.
Usually you would want your fighters to arrive at the target at the same time for maximum punch and minimum exposure and the whole stack will also get the bonuses from ECM and combatsensors.
(Ab)Use it as a feature