Ezreal has been dealing double damage since 6.4 of his normal damage

Since patch 6.4 Ezreal has been dealing double damage, this occurs like 90% of the time. If your level 1 attack damage is around 70 AD you deal around 150 damage a basic attack, the math does not add up, you will deal less than 70 damage per basic attack because armour will reduce the damage value. To clarify I am giving rough estimations, no where near exact values, and this damage is against champions - minions and monsters as far as I can tell is receiving the correct damage from Ezreal. So if you ever wonder why a Tear, Doran's Blade Ezreal is dealing as much or more damage than a B.F. Sword, Doran's Blade marksman it is because Ezreal is currently bugged and should be disabled as it provides unfair gameplay. The other possibility is Ezreal is not bugged and just a very high chance of them using an increase damage cheat.