My Butt is High on my Back! With a Brazillan Butt Lift, Can This Problem Be Corrected?

Thank you for your question.  Brazillian butt lifts are very versatile in that it includes liposuction from areas where you don't want or need extra fat and transfer to areas that would benefit from augmentation or shaping.  If you have a high shelf, liposuction can be used to reduce it so that the overall appearance is better.  A more specific answer would require a picture. All the best.

Hello dear!!
Thanks for the question and provided information as well. 
Unfortunately, without pictures, it is very difficult to give you a proper answer. 
In general, you need to be physically healthy and at a stable weight, have realistic expectations, be a non-smoker and your BMI needs to be 30 or less. l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)