Since I was watching it while waking up before work this morning, I am curious on the exact errors. . I've only played two games of X-Wing so far and awaiting my Wave 1&2 order to arrive before playing more and hence I know I got the Target Lock rule wrong (thought when using a missile/etc that you discarded it).
Well...unless you're shooting a Homing Missile...you do discard the target lock. For concussion missiles, cluster missiles, and assault missiles you discard the lock.