creep attack lag!

Urdthedevil - Heavens Tear

I have noticed when I attack a creep, then run away: The creep does not show the animation of performing an attack yet I receive an attack, especially with ranged creeps. For example when I kill an archer, it shot an arrow at me, and I kill it before it shouts another arrow, but the creep still attacks me with an arrow that it did not shoot, and attacks me again when it falls. Which means I was attacked 3 times instead of one. I have noticed that you will get attacked at the point when creep is planning to attack you, it doesn't matter if you are out of range, or you have tp to another location.