I personally find the moderation queue settings ridiculous. Sure, to post a topic is fine, but to post a reply to your own topic and have it get queued? I feel as though replying should be instant, with no wait, that way it gives other users the chance to help instead of only moderators and staff.
Only messages that get classified as spam gets directed to moderation queue. Normal messages get displayed directly. So if you reply was queued, then its content was detected as spam. The message will be released from queue after a moderator reviewed it.