One breast implant is sitting lower than the other (Photo)

Originally, I asked a question about potentially having CC (330cc silicone under) and I asked if my implant sitting lower on one side is normal or not and it appears that it may not be normal. I already have an appt with my PS on Thursday, but I'm curious to know if this is normal if my breast sat lower pre-operatively. Could the implant sit lower because my breast was already lower than the other? Is my implant too heavy for the pocket? No pre-op photo, but a photo one week post-op.