US Immigration from Guinea

hey please are there people here waiting for their interview at the embassy of dakar (senegal) in the category f2a, f2b, f4, f21, made a sign we want to know at what level is the embassy on visa processing

My mother (who is a part of my household and a dependent on my tax return) petionned for two of my siblings living overseas. Our family size is 6 + the 2 intended immigrants (8 people total). She is filling (2) I-864 (with $0 income) being the petionner, and I am filling an I-864A with 65k (more than enough for 8 people). My question is how do we do the count to reflect a family size of 8 on her I-864. So far I can only come up with 3. There is no family member count on the I 864A.

Family members: My mother, Me, my wife and 3 children.

Thank you & your help is greatly appreciated.