Why, at the beginning of ברכת הזימון is it comon custom that the leader opens with "רבותי נברך" and later he continues with "ברשות מרנן ורבנן ורבותי" .
Why, at the beginning does he only address רבותי, and later he addresses מרנן ורבנן ורבותי.
Also why would he say "רבנן ורבותי" which means "our Rabbis and My Rabbis"? Isn't our Rabbis already inclusive of his Rabbis?
