Why is my butt still flat at the bottom after 2 BBL's?

I had 2 BBL's before and I’m a weight loss patient. First had lipo, BBL, and a tummy tuck. Second I had lipo, an arm and back,lift, and a BBL. I see a difference after each rd but I still do not have the booty/ body I desire. On top of that these fat transfers have made me gain 20 pounds after each one. Now I’m back at almost 200lbs but it’s all in my hips and butt. I’m going for rd 3 for rest skin removal on my back and bbl. I’m so tired of this problem area and I even used boppy pillow both rds.