It's hardly possible that Tokiie used the name of 'the Sho clan (Honjo) of the head family' under the situation where nobody knew when the head family were coming back.
いつ本宗家が帰って来るか分からない状況で、分家である時家が、「本宗家の庄氏（本庄）」を名乗れるはずがない。