Cannot merge same field name files
if you wanna improve your software just do same as free online merging websites, at least using these websites let me merge files with same field names without changing the information.
Anas Jawabreh shared this idea
Planned · AdminShweta Sharda (Admin, Adobe) responded
Thanks for reaching out to us and apology for the trouble. We are considering your request and will resolve soon.
Acrobat Web Team