Hi! I had this same thing happen last year before I was offered my appointment, it seems to happen to everyone so don't worry too much about it. In my case, I didn't even accept orders in the portal or saw that I was offered an appointment. I received a phone call and then my AO emailed me a PDF to accept my orders.
Furthermore, if your DD wants to talk to an unbiased source/current plebe, I know of several plebes (myself included) that would love to talk about anything she might have questions on (Indoc, Sea Year, Majors, Classes, The Regiment)