If he had noro, he is most contagious days 1-3. There is some debate if he can spread enough virus to make someone ill from days 4-10.

Have we ever figured out if he had noro or fp or something else??

It all depends on whether or not your dad is a good hand washer and if all areas where he v.. or had d.. have been cleaned properly. If he is a good hand washer and the bathrooms have been cleaned properly, then the virus will not spread unless he v.. or had d... in front of someone. Is he the only person in the house? If there are more people in the house and no one got sick, then he is probably a good hand washer and there is nothing to worry about. If not, then stay another week if you feel comfortable there. Relax