If a counteroffer is accepted, you report all data subject to what the counter-offer represented. In this case, incomplete and one applicant. Here's some regulatory references to support this:
If an applicant accepts a counteroffer for an amount different from the amount for which the applicant applied, the financial institution reports the covered loan amount granted. [Commentary to §1003.4(a)(7) #1]
If an applicant does not accept a counteroffer or fails to respond, the institution reports the amount initially requested. [Commentary to §1003.4(a)(7) #1]
If a financial institution makes a counteroffer to lend on terms different from the applicant’s initial request (for example, for a shorter loan maturity, with a different interest rate, or in a different amount) and the applicant declines to proceed with the counteroffer or fails to respond, the institution reports the action taken as a denial on the original terms requested by the applicant.
If the applicant agrees to proceed with consideration of the financial institution’s counteroffer, the financial institution reports the action taken… based on the terms of the counteroffer. [Commentary to §1003.4(a)(8)(i) #9]