An update for anyone who wants to know what's going on with this horse...
Due to the horrible weather a tree fell and took out a bunch of our fencing. The horses decided to leave, and traveled toward and even into the road. Getting them back in was a pain, one is blind due to somebody cutting both of her eyes before we rescued her, so she spooks very easily. The other was the mentioned horse that is showing aggression, and boy did she prove her aggression today. She gave my father a light kick, and then for the first time ever... charged at me. This horse was supposed to be my own personal horse (promised beginner safe, etc) for riding. I am thinking that since she has been showing such dominance toward me I am going to try to find a new home for her, and look into a horse that is actually beginner safe, while still taking more lessons.
She is a great horse, she is just sadly too much for me to handle at this stage in my training.
The blind horse was much easier returned to the paddock, even though she spooks at nearly everything she is an absolute sweetheart. I wish she wasn't so easily spooked, or blind, because I'd feel I would definitely have more success with her. Our bond is much stronger.