Don’t think it has ever been a counting issue more of question of an adrenaline in heat of the battle thing where some simply forget that they have a whip count to stick to.
In some races when you watch a driving finish you can clearly see a jockey put his whip down and go to hands and hells riding as they have clearly been counting and have reached their total uses limit.
These type of incidents are always going to happen with the current rules where you have a number limit – I do wonder if most of the Stewards time is spent watching replays of races in which they are all counting the number of strikes of the whip each jockey has used. 