Moshe Was a Nasi

MOSHE WAS A NASI

מסכת קידושין דף לג/ב נשיא עובר עומד מלפניו מלא עיניו ואינו יושב עד שישב במקומו שנאמר והביטו אחרי משה עד בואו האהלה (שמות לג, ח)

Rashi explains that Moshe was a Nasi and the people did not sit until he was out of sight (not like a Chacham or an Av Bais Din, for whom one can sit after they move 4 amos away). However, we learn elsewhere that Moshe was considered like a King, and if so, how can one learn the law for a Nasi from the verse concerning Moshe. Therefore, one would have to say like the Medrash that Moshe was not considered a King until after the giving of the second Luchos, and this verse is prior to that point.