We first tried lunging her once out side of the round pen since she's honestly a bit too big to canter safely in the pen. We can't get behind her. Its not that she's being obstinate, we think its more of how she was trained. She does the same thing when I try to wash her tail. She'll just turn and face you.
I even had my instructor hold her so that I could get behind her and try it that way but she'll just walk a step or two and then turn to face me and follow me around like she's on a lead line.
We tried lunging her 2 times in the round pen and the issue in there is that she wont back away from me. She'll walk and trot only 3 foot away and it makes me uncomfortable since she'll randomly throw her head in the air when I crack the whip. I don't like being in such a close proximity to her while she's trotting. I've tried waving her away, I've tried keeping the whip at her shoulder, waving the whip near her head and tapping her side with the whip but she just doesn't seem to get it.