Since the original application was in the name of both applicants "or an entity to be named"
I'm not sure you had a joint application or if joint intent was established based on the information presented in this thread.
We received an application (in the form of a PFS prepared jointly between husband and wife)
From the Commentary to 202.7(d):
For example, signatures on a joint financial statement affirming the veracity of information are not sufficient to establish intent to apply for joint credit. Looks like you may need to review your "application" process for business loans.
As for the question on the AAN; I don't see where AA has been taken