Strange input lag help

Why when I play a melee like for example warrior my basic attacks do dmg but my weapon animation hits 1 second after? It shows i did damage but the animation and damage number shows. When I also right click the enemy multiple times my weapon attack animation hits like 5 times but the dmg shows only normal, sometimes its very slow and spam and sometimes very quick and the dmg stays the same ive been playing this game for a long time and I like melee dps and tank way more than casters but i still play casters because this is annoying. I have the reduce input lag checked, my ping is perfect and I havent had this in retail only wotlk someone pls help