Bugged or Hacked damage numbers in ARAM (I only play ARAM so not sure about other places)

Over the last few nights I have noticed on occasion that damage from certain people have far exceeded the norm. I play on ARAM and one such instance can be found on 12/5/2014. A game I was in had a Karma, I was playing Anivia. I got hit with a 1385 Karma q non-ult version (the ult version leaves circle on the ground. At first I thought wow a big crit from karma but her ap at the end of the game was maybe 400ish and according to match history she had no crits, which means it was a normal hit from the q. That his aside she was hitting for around 785 on a regular basis with her q, when with that ap she should have been hitting for 500 at most. To hit for 785 on her q her ap would have to be around 880 (it was around 400) or she would have to be getting nearly 130% ap added on. Karma (DawnCorpse13) did have 1 item I don't see too often on aram and that was the frost queen's chain. I noticed something similiar on 12/4/14 with a pantheon (ultraman). Pantheon used his w and crit for 585. He had no ap items (the w is ap based) and no crit damage increasing items (infinity edge) so it should have been around 300ish being a crit but was almost double that. I noticed that he had an atmas impaler which was practically useless on him since he wasn't building health items. I do not know if it is something to do with those items or not, though it is rare to see them on ARAM. I just wanted to let someone know about these cases and I'm certain there are more. If this is a bug or hacking issue I hope that it can be resolved so that others and myself can get a fair go of it when playing a game we enjoy.