I don't know man.
I was just watching a friend play and he was going one on one with another player at left cap and he was going to win the fight until the enemy player ran away, seeing that he went ahead and didn't chase but instead decided to cap and would have had it. That is until he got hit by a dot, then by that time the enemy player was back and well yeah.
Its not a good reason that damage is damage. If a dot last that long.
Annnd if a enemy player runs away then he has given up the point and therefore the opposing player deserves to cap it given he has enough time.
Just sayin.