Well when you create a thread you've automatically read it, makes sense ofcourse becuase you made the thread. The "new posts" section only shows thread that have two things; they have atleast one post that hasn't been read by you and they contain a "new post". And a thread you created doesn't contain that first one, you have read all posts in it. Only if a new post is made in it and you've not yet read it it should appear in the "new posts" section.
I think he wants to be sure people can see his thread when they look in their new posts section. They can.
As to your thread on unused Airports, I frankly wouldn't know because I don't know much about AI....
This forum software is great, the best I have ever seen. I love the way it bookmarks where your last read was in a thread. The software is very intuitive and you can't compare it to any other forum software.
Also good about this forum is if someone is in the middle of writing a post and presses the wrong button or has a crash. The next time they log in the saved draft will come up so itàs to nec essary to have to re-write everything.