I doubt them not treating two lymph nodes. There are between 200-300 lymph nodes in the neck anyway, most microscopic, and if two tested positive, and assume it was the soft palate involved (oropharynx), they probably treated from the top lip down to the bottom of neck, and possibly on both sides, which includes chain of lymphs in levels I-VI, usually level II is first involved in the oropharynx, to get any not picked up on the PET and areas likely to metastasize, usually when less than 1cm. As mentioned, ask if the lymph nodes were treated, and they can do a biopsy of the soft palate, and the Lymph nodes, which may be done by needle biopsy, if possible. It could be a false positive, necrotic lymph node, inflammation on the PET, so only a biopsy can tell if it's cancer or not. Usually for a recurrence in the lymph nodes a neck dissection is done, and may want to do that anyway, as a planned neck dissection, instead of watch and wait, even if negative. Soft palate may have several options. Good luck with the doctors.