Out of sync with server

[gojita69]

My ping with the server is 68 and the connection bar is green. For some reason when i approach a mob and try to hit it nothing happens and when it dies it dies @ 100% health while I'm grouped. When I zone I go link dead and end up straight to my desktop.
I did some speed tests on my internet connection and every things working as it should so the only thing i can explain is packet loss or some kind of sync issue.