#2. If you use distortion field to break a missile lock before a missile has launched, it'll break the lock, but they will immediately be able to lock onto you again, it does not break the lock for the full 6s (or 3s that it used to be before). If you use it after a missile launches, it will not avoid the missile. This I believe is bugged.
It's never done this, as far as I know. It would be ridiculous if it did, and the description doesn't even imply that it would.