No matter how you slice it the numbers all come out the same. If that is your current position then you are long XYZ at 9$ per share. You just have to learn to see it that way because if you in turn sell 100 shares at 8.25 your not up in one position and down in another....you just locked in a .75 loss on those 100 shares. It is important to see it that way so you don't get lost on where you are at.
If you did it in another brokerage it wouldn't change a thing except fees. (it would cost more to sell the whole position at once.)

Net/Net more money is probably made from selling trading ideas than the trades themselves make.

"Those who have knowledge, don't predict. Those who predict, don't have knowledge."
Lao Tzu