I had the same problem with GS. On such big news it is quite understandable that markets do not open completelly orderly. somebody gets a better fill, somebody worse (like me) - definitelly not the reason to bust trades...(GS now trades much lower...)
p.s. i could not get my limit order filled - I had to take the risk and change it to market - then it went smooth...
p.s. i could not get my limit order filled - I had to take the risk and change it to market - then it went smooth...