1)
Seeing as the Eil ha'Mi'lu'im was Kodshei Kodshim why were Aharon and his sons instructed to cook and eat it at the entrance of the Ohel Mo'ed and not in one of the rooms that opened into the Azarah?
1.
Zevachim, 56a: It was a Hora'as Sha'ah (a one-time ruling that pertained to the Mi'lu'im, exclusively).