Monsters' aggro is ridiculous

I just had a game where I invaded the enemy blue, took the buff and left the two little ones. After that, since enemy team is already searching for me, I decide to recall there http://i.imgur.com/tweBcYl.jpg Which is a place people usually won't think of, relatively safe spot. However, those two little blue son of b****** followed me all the way to here http://i.imgur.com/JbsorQi.jpg That was at least 5 seconds, like wtf that's totally out of blue buff territory. And it took them another 5 seconds walking back to original position After that, of course, my location was sold out by them, since the enemy team saw them moving. and I was caught at the last second of recalling.

I don't think that's reasonable, it gives the enemy team at least 10 seconds after you finished buff to know your direction. And you can't recall at the first 5 seconds because those edgy golems still think you are within their territory and will punch their little fist at you.