Math is so hard

I've noticed your game is having some pretty abysmal problems with simple calculations recently. For example a no item graves level 6 ulted me for 1200 which seems high I know graves is imbalanced but still. Yesterday I spent 30 minutes of a 50 minute game taking true damage from AD champions despite having over 450 armor. I've also noticed since your missile patch lots more players are able to land skill shots that they miss completely. I know you guys have most of the staff devoted to maintaining the store but has anyone noticed similar problems or is it just my client?