Top level thread is when you use the thread box on the main page (the latest). A reply threads is when you comment.
So here you posted a top level thread and I made a reply threads.
If you want to post a link, simply post the top line thread then reply to your own thread and post the link.
Thanks a lot - that's a very clear / easy to understand answer :D
Wish you a chill monday ♥
Glad to help.
Even tho I understand your answer - the help text doesn't seem to help; If I do it like this, I get the same error x'D