Swarming, Fxxx

Ok, so I see that swarming has been fixed.

So how did swarming work before and how is it fixed now?

Also, has the Fxxx problem been fixed? The one where Fxxx does not cause a failed mission to be removed from the active missions, even if the mission is marked as abortable.

Swarming was "broken" before in that only the lead ship in a swarm would reliably fire secondary weapons like missiles. Now all the fighters in a swarm will fire missiles when in range.