Both of your threads are showing up in FS/FT, and can be seen. I've closed one since they're duplicates. FS/FT moves very quickly, so they may be moving off of the front page by the time you look.
The forum has been undergoing some maintenance, so it could be related to that. If you look at your own profile, and select "show all posts/threads by user" it should help you find them again in the future if needed.
When new threads were not being shown, I did a search for my own threads in an attempt to see if I'd even posted them. The threads I'd recently created did not appear. They re-appeared several hours later.