Possible Hitbox bug with Xerath and sever other champs

I have been noticing with champs that give you a Red Target Zone for their attacks when they come in that they aren't very accurate. I will step through them and out the other end and still get hit while outside the target zone, yet I've also noticed the edge of it sometimes will cause you to be missed if you are on the top end of it, toward Baron, but if you are on the bottom end of it, toward Dragon, you'll be hit in the same edging. Also noticed Ziggs' Q has a similar issue, will see it explode on a minion with a good distance between bomb and minion, but will bounce over a champion when hitting on the arm or with hitting the head mid bounce. I think it's worth checking the hitbox zones to make sure they are lining up properly with the animation and target zones as it makes players think others are cheating when they made a dodge but were still hit.