This is quite interesting. I had the opposite happen to me this morning (so it can work to your advantage) but I was *very* lucky.
I had a buy in for FAR at 11.5c (second in the queue from memory). I missed the start of play & the big announcement this morning. It dropped big time (60% for the day) but my buy order was triggered at 4.5c so I'm up $80 at the moment.
I use eTrade who don't have the best reputation either but just goes to show - some luck is required :)