Uneven butt right after BBL surgery, is it the doctor's fault?

    What if the doctor injected the same amount on both sides and both sides did not expand to the same degree? 

It's still too early to tell. You may have asymmetry now, but as things heal and swelling improves may find that this resolves. I would express your concerns with your surgeon now, but continue to be patient with the healing process.

Dear itssammy26,fat transfer can cause swelling which might cause problems with asymmetry. Most plastic surgeons will recommend you to wait few months to see your final results. If you have any concerns, you should discuss them with your plastic surgeon.  Daniel Barrett, MD, MHA, MS 
Certified, American Board of Plastic Surgery  
Member, Am. Society of Plastic Surgery

Thanks for your question. Without photos or details of your surgery, no one can say for sure without an in person visit or possibly some studies. It's probably too early to say, but there are some possibilities as to why you are asymmetric, such as additional swelling or bruising on one side, or fluid/blood that has collected there. You will need to follow up closely with your surgeon and discuss your concerns, and do this primarily for your safety as you may be having a significant complication. It's possible that a revision may be needed, or things may even out, but it's far too early to tell. So be patient for now, and stick with your surgeon to guide you through the initial recovery period.

No one can properly answer your question at this time. Most people aren't errantly asymmetrical and this is often seen especially early after procedures such as a BBL.
The buttocks also hold tight layers of connective tissue you that for some people does not allow the buttocks to take the shape the patient may want regardless of how talented the surgeon is.
I have seen surgeons who have it delivered that's at stellar results but more so particularly with a BBL I would say each person has the potential for certain types of improvements. These very from person-to-personBest,Mats Hagstrom M.D.