When I turn with A and D, my whole body and camera rotates awkwardly and its very hard to navigate, any binding/options advice?

I just got DayZ, I load up the game, and I get a pop up saying I need the addon "CA_communityconfigurationproject_E". I hit cancel and the game ran anyways. Then I tried to join a server, but all of them seem to need version 1.62.103718. But apparently I have 1.62. Please Help! I got the game through steam, but I don't know if that changes anything. EDIT: I found one servers that I could actually click "join". Shortly after I clicked I was brought back to the server screen with a message saying I was kicked for not having the mission downloaded or something of that sort. I managed to join a veteran server, but I am a complete noob. A few servers that say they have 1.62 on the bottom bar i get kicked from pop up a box saying "Bad Version".