Pre op asymmetry
Your right breast is larger and more full at the top which hides the implant edges more. Weight gain, smaller implants, or fat grafting will help soften the implant edges.
Above the muscle
I am sorry that your result is not what you expecting. Your before pictures show uneven breast and putting bigger over the left side could correct the shape aymmtery. You had saying of the breast tissue and implants could not correct this. For patients with similar asymmetry I would recommend lift at the same time.
Why is my left side looking so circular on top?
Thank you for sharing your question and photographs. Without an in-person assessment it is difficult to offer definite recomendations but if you have seen your breasts harden over the last 10 months you may have a capsular contracture on your left side affecting the implant shape, or the pocket created for the implant was too small. I would try and travel to see your surgeon to have the appropriate diagnosis made and a discussion of possible treatment options. Hope this helps.