I have been going through a lot of trouble trying to get my heat treat right. I am using 1084 and canola oil in a gas forge with a proper venturi burner(my first couple burners were pretty large torches and they just werent cutting it). It looks like you are experiencing similar issues to me.
Here is one that I did correctly. Look at the center of the two pieces as oil has stained the edges in this pic as I didnt take it immediately after I broke it. The blade should snap pretty clean when done correctly.
https://drive.google.com/file/d/0Bxh...w?usp=drivesdk