Oh god, the US Embassy is a really daunting place, at least here in England it is. The VISA application process is HARD! I'm sure everything will go to plan
Good grief, what a load of nonsense!!! I know about the ears thing. A woman I used to work with had much the same issue. She was going through the process of becoming a US citizen and had to travel from Ft Myers to Tampa several times. They refused her first photos because she had a single strand of a few hairs (literally, a few HAIRS) that fell from her updo, and were straggled over her ear. They said it obscured her full ear. It did not (I saw the photo) but the immigration officials refused it.
So, I hope all goes well with you! (How absolutely ridiculous about the tiny earrings on a baby). Sheesh.