Merge data from users into a single form?

I created a dynamic pdf form in Livecycle Designer ES2.

It includes a repeating subform to capture information on problems detected during a site visit. Typically, during such site visits, there are multiple auditors and each may identify different problems.

At the end of the site cisit, a single list of all identified problems is generated.

Is there a way for each auditor to fill in a form and merge the data from all auditors into a single combined form?

I tried to export data from one user and import it into the form of the second user but it over-writes the information.

Thanks