Parashat Ki Tavo – Opening Questions

Though the Torah appears to command that the ceremony on Mt Eival take place immediately after crossing the Jordan, the fulfillment of the command in Sefer Yehoshua seems to take place much afterward. How should the discrepancy be understood?
Why is the person commanded to recite the text of "אֲרַמִּי אֹבֵד אָבִי" when bringing first fruits?
How do the blessings and curses of Devarim compare to those in Vayikra?
What is the logic behind the ordering of the various blessings and curses?

Parashat Ki Tavo/Questions