I noticed in my original post the difficulty setting was on Story. I just went back through the mission on Normal and it still didn't count towards my progression. What's the point, then, if I can't continue any further? =\
it was invaded on the screenshot, you need to do it when its not invaded by BT, you should run it against outcasts, so wait until its not invaded anymore and run it again on normal
it was invaded on the screenshot, you need to do it when its not invaded by BT, you should run it against outcasts, so wait until its not invaded anymore and run it again on normal
You don't have to wait until the invasion rotation changes, just disable Invasion from the mission options.