I am sorry mate, but the answer is right there ,"acknowledgment letter her name written as a non migrating members". This is just my thinking but i might be wrong, i think your case might the same as Sundhar which means you might be granted 887 and she might not, in that case then you'll have to apply for subclass 802 or 101for her which might take more time to get and cost you 2415$,and that's after you're granted your PR.
I am not an expert, but my opinion is if this was me i would just withdraw the application and re-apply immediately, Again i state this is just my opinion as i am not an expert. Forgive me for my harsh opinion, I hope everything works fine in the end.