When playing attacks with step (that are also considered move cards), movement enhancement auras trigger AFTER the complete attack has been resolved. Don't know if it is intended to be this way, i played a step 1 card (lunging hack) thinking the aura would let me get further away and it didn't. (btw, it caused me to hack my own priest )
We have a number of threads about these issues, and I keep quoting Jon's response: (Same applies to movement enhancement.)