Please help with filling of form I-864

[johnhan0621]

I am trying to filling out the form I-864 for my wife to come to the united states and I am really confused about some of the questions please help me
this is a new form I-864 expires on 07/31/2017
on part 2 information about the principal immigrant I put my wife's information there her name birthday mailing address......

on part 3 information about the immigrants you are sponsoring item 28 enter the total number of immigrants you are sponsoring on this affidavit from Item numbers 1.a-27 what number should I put there 1 or 0 because IF I put 1 there on part 5 sponsor's household size will become total 3 persons but I am only there myself and my wife is the one I am sponsoring and fill this affidavit for
so I am really confused about this under the part 5 number 3 if you are currently married enter "1" for your spouse which I should put 1 but my wife is also the one I am sponsoring and fill this affidavit for so IF I put 1 on part 3 item number 1.a-27 then I am counting my wife twice that would be wrong too so please help sorry for the bad grammar hope you guys understand what I am saying