The system may need to catch up if you made the posts in quick succession. Are you on mobile or desktop version of BYC?
If on mobile you may need to switch to desktop to posts an ad. You can do this by scrolling right down to the bottom of any page and clicking desktop ~
You can ask questions within the forum by starting a new thread or by replying to an existing thread just as you have here. The forum is broken down into different sections that cover a whole range of topics.