well dependign on what each means.
I look at those two statements and I think this.
One stay behind the pole;
well stay behind the top end of the pole, the middle of the pole or the bottom end of the pole. Hmm that seems like a very vaque statement to me. Who knows what your coach is telling you there.
Second move your hands;
This keeps you behind the pole during the entire vault. And applies backwards pressure back towards the runway and not wanted unless you use a tuck and shoot model of loading the pole with a big bottom arm.
Well if I was you I would be very confused as well. Both of these statements are very generic and pointless.
My opinion has been stated; Stay along the pole cord during the enitre vault. If the pole stays straght keep as close to the pole during the entire vault. If it bends stay as close to the imaginary pole cord during the entire vault.
For more information read the novel I wrote in some of the other posts.
As far as moving your hands or not moving your hands. I would say no but than again what model does your coach use. If you don't even know that and he or she can't tell you. Find a new coach.
Or have him or her sit down and explain what they want to accomplish in coaching you.
There needs to be more dialogue between coaches and athletes in terms of what model they are using and why.