Originally Posted by
Gifted
After looking closely at the video (TvZ Desert gameplay, part three, around 3:20) I think I found out what happened.
If you take a unit with an autocast ability on, and direct it to "MOVE" it will move to the destination no matter what. If you take a unit with autocast and ATTACK MOVE to that spot, autocast will take priority. What I suspect is that the person did not use the ATTACKMOVE on the unit. (The button was there and not greyed out)
I haven't looked at the other linked videos yet, but if they have a moment with a changling changing correctly, look at the buttons if you can and see if they use "attack move" or "move" or "move -- then -- stop".