1)
Bearing in mind that the Torah is discussing the Chazeh, why does the Torah first insert"Vehiktir Aharon es ha'Cheilev" ... before "Vehayah ha'Chazeh le'Aharon u'le.Vanav"?
1.
Rashi: To teach us that they acquire it only after the Cheilev is burned on the Mizbe'ach. 1
1
Moshav Zekenim: This is when the Cheilev is intact, but if it became Tamei or was lost, the Kohen acquires the Chazah v'Shok through Zerikas ha'Dam - "v'Dam Zevachecha Yishafech? veha'Basar Tochel" (Devarim 12:27).