Where did you create threads? You can't delete threads in certain boards.
Are you sure that you can't delete threads only in certain boards?
You can delete threads only if nobody has seen them.
No. That's not a correct. There are certain boards in which deletion of posts is not allowed, like Auction section, digital goods and a few others. However you can delete your posts in majority of the sections.
This has really nothing to do with if anyone has seen the post or not.
You are wrong, the OP was referring about
topics not the posts. Maybe he has tried to delete a topic created by him and he failed, I think you cannot delete a topic where someone has replied to it.
Okay. Got it. Sorry it was threads and not a post.
But I just tried deleting my self created thread, it showed- "An Error Has Occurred!
You cannot delete your own topics in this board.
"
Even if you are talking about the thread maybe deleting a thread is only limited to certain boards(cause the error message says "you cannot delete your own topics in this
board "). Maybe I am wrong but then it should have said something like - "Someone has already replied to your thread. You cannot delete it now".