This report is based off the back of evidence i collected for this bug report on the head torch - http://feedback.dayzgame.com/view.php?id=5949
What you see in game when playing in 1st person, is currently often unrelated to what your avatar is doing. This is especially important now with things like head torches and other items you can wear on your head (night vision eventually etc).
This is especially critical when using TrackIR (a supported device) as it makes life very difficult sometimes when navigating around the world.