You have to ask the question why on Earth ED uses a mechanism whereby missile flight is calculated on every single client.......it can only ever mean that due to every client having different network overheads and performance then there are different missile flight coordinates being reported to the server.
There is no better fix to this. Planes and missiles cover huge distances between network update ticks. If each client didn't perform some form of dead reckoning in between network updates, you as a client would see missiles and planes jumping all over the place *all the time*. There are some things you can do to make sure that there is less desynchronisation between the phantom and the actual missile/plane/whatever, but unless you're on a LAN, you have zero chance of updating all clients fast enough without them doing dead reckoning.
