This sounds unusual - i did the on-line application with my husband and clicked husband - printed it out, all OK. I would go to http://www.ukvisas.gov.uk/en/howtoapply/vafs/ and get the VAF4a printed out, she can fill it in in pen, she can then take both back to the vfs - but don't worry about appointments, tell her to go at 7am Monday for drop-in, then you can always go back for the appointment on tuesday if needed