The Admissions Office shuffles nominations to appoint cadets they want, so getting multiple nomination is good but I was told by my RC he had cases where a candidate with multiple nominations didn't get appointed.
The appointment authority for non-Congressional nominations are usually "up to." So with ROTC nominations, I believe West Point can appoint up to 20 cadets. Accordingly, if West Point appoints to "up to" number, they will go over the limit (the total size of Corps being limited to 4400, so they can appoint only so many per year). So some scenario for you DD
Some scenario for your DD
Your DD is must accept, West Point will offer her appointment sooner and figure out which nomination to use later (even if your DD has only one nomination not win her nomination category, she can be appointed from the National Waiting List).
Your DD is should accept, West Point will wait to see where she ends up in the Congressional/Senate/ROTC nomination or National Waiting List standing to figure out which nomination to use to appoint her. This gets complicated other candidates emerges, the RC might have to keep shuffling nomination to maximize appointment numbers. So my understanding is that the final charging of appointments against nomination category happens at the end of the admissions cycle.
Getting nomination is good, but just make the waiting worse.
Best of luck.