Hey Mac, did your order get filled?
Just as an FYI: Most of my orders are small so they fill in one batch--but from time to time, I have a larger one that will then, split into 2 or more batches.
I never use AON/All of None but I use "limit order" and place my best price at that time.
When I do have a large order and it splits, I actually get better trades on the second part. If you place a limit order for example,.065--it won't go over that price, and may even buy lower on the second batch split--with just one commission.
The main thing is to get the shares--don't sweat a few pennies. (But as a woman I am not so concerned about saving--just purchasing!;>)
Go KATX, go!