#1 NT means no text in the body of the message. This simply means it is a blank post with a title only.

#2 Jump means you get to "jump" to the parent post of the thread. Which is of use if you want to view the original post. The screen will then display the current post position in that thread.

#3 When a post gets replied to, it gets shifted to the right in the reply. When a thread gets long, it can get shifted to the right so much that it is almost off the screen.

#4 Post numbers are not part of the Search Forum feature, but you can plug them into a URL to view that post number, like:
[link|http://z.iwethey.org/forums/render/content/show?contentid=112070|http://z.iwethey.org...?contentid=112070]
Just replace 112070 with the post number you wish to visit. There is a WeeCode to put a post number in for a reference. See here for more info: [link|http://z.iwethey.org/forums/render/content/show?contentid=57396|http://z.iwethey.org...w?contentid=57396]