When implants are first inserted, they sit high up because your tissues are tight and gravity hasn't taken effect. Over time, natural tissue expansion occurs to allow the implants to fall into place. By this time, your breasts will have taken on a more natural contour, where the lower breasts...
Yes spitting stitches can be painful. However it is very important that she see her plastic surgeon as soon as possible to make certain that the suture material is removed and that there is no surrounding infection. Ask your plastic surgeon if Epsom salts soaks would be helpful.
Your asymmetry will not be addressed by scoliosis correction because you need to correct the volume asymmetry. Breast implants can be used to give you an improved look. Understand that your two breasts will never be identical but they certainly can be made more even.