Missing two gate seals...

I missed them in The Void Beyond after finishing up matters in the Sunleth Waterscape. I did not notice them when I went through The Void Beyond and now I fear that I missed them and can't close gates that I need to close to get all the paradox endings. Did I really muck up and thus have to restart or do I just need to re-close the Waterscape 300 AF gate and do that over?

*EDIT*

Okay so I had to close the Waterscape 300 AF gate and redo everything from there to get back to The Void Beyond which is just fine by me.

Now I can close the Steppes and the Colliseum if I so wish.
Now to finish all the Steppe hunter missions -.-