I dont know why you have only 61, you have masters degree both of you, unless if you r wife's area of training is not in demand at all.
Anyways your age and IELTS and Master Degree and having one Child are more than perfect !, and you still need 2 points to get 63 in total and have waiver apportunity.
But one can get these 2 points so easy, so if they were so buy to make interviews
and decided to enhance the idea of canceling the interview, then i dont think they will call you for it.
By the way if you have time, you can make A2, and resend it back ( if you had time to wait for 120 days for certificate ), then do it and by that i dont think they will select you to interview at all.
One Question here: have you sent the original copy of A1 ? or only the attestation ?