1 share can go through during the day also. Same scenario apply...

1 share can go through during the day also. Same scenario apply but instead of cue jumping a seller will sell their amount of shares at market (over $500 worth). Just so happens they line wipe the first line but still have 1 unit remaining to sell which gets sold into the next line. The person who just happen to only buy 1 unit did have an order in the market for over $500, just things happened out of their control to only purchase 1 unit. Though during the day their order maybe hit more times and possibly be fully executed.

There in no illogical, inconsistent and irritation process, majority of share traders are just ill informed on how the market can and does operate. Once you see how things can happen within the rules governed by the ASX you can learn to play the game in a different way.