TJ,sounds like you may have changed your limit amount after the order was partially filled. I mentioned this on my last post, but it's a mistake I made. One order, one fee per day, unless you change something on it.
Trapper, that is correct as far as I can tell. I have many times raised and lowered my bid on the same order and only been charged one fee. I never use AON orders as they tend to get passed over.