The photos show symmastia. Correction of symmastia is a complelx surgical procedure that involves creasting a new pocket for the implant and possible adding support - such as mesh or a dermal matrix - to the inner part of the pocket. I would suggest that you discuss with your surgeon and/or a board certified plastic surgeon with a great deal of breast implant surgery experience.
is not considered normal, nor aesthetic. Start with your surgeon and find out what options are available to you as there are many choices to consider from suturing to use of scaffolding. If your implant is too large, it may have to be changed as well. And using a shaped implant may help prevent medial migration again. But these options can only be thoroughly discussed in a face to face consultation. If your original surgeon doesn't have a revision policy that helps decrease costs, getting another opinion would certainly help.