Okay so I did a derp thing. I gave Mrs. Horizon 9 maps completed and did not expect there to be a 500 AF Academia to explore. When I re close the 400 AF gate I do not get the option to give her the final map.

I went and re opened the gate and ran ALL the way back but hit some barracades that I can only open from the other side.

Do I have to close the 400 AF gate, finish it like normal THEN run back again while the gates are still shown as opened?