Numbers in the form I-864

[dekedwin 52]

The I-864 form has been really confusing to me. Someone finally explained to me that I need three of the I-864 forms, one for my wife Cresencia, naming her as the principal immigrant, another for her son naming him as the principal immigrant, and a third one for her daughter, naming her as the principal immigrant. Nothing is to be entered in the Family categories 1, 2, 3, 4, and 5. Nothing is to be entered in Part three, except I am sponsoring the principal immigrant named in part 2.  So I check yes to that one. Then in 5. Family size we are supposed to enter the number we entered in number 28.  There is only one principal immigrant for each affidavit, so do we enter 1 in each I-864? and 1 for the sponsor. My sister is joint sponsor and she is alone, so she is sponsoring three, my Philippine Wife, and my wife's two children. So she is sponsoring three, and she needs to have finances to cover those three and herself for a total of four. How do we fill in the numbers. One principal immigrant for each I-864, and one for my sister on each I-864. Is there any way that we are supposed to show on each I-864 that there are three immigrants being sponsored? How do we put the numbers in on the forms I-864 so they will be correct, and show there are three principal immigrants, each having an I-864, a total of three, because there is only one listed on each I-864 form, and then how do we correctly show my sister as the joint sponsor, that there are three immigrants and my sister for which she is financially responsible. If someone  could help me understand this that would really be great! Thank You!