Hey, hello, there isn't a restriction, per se, that requires posts to be approved, however, you've been getting caught in the spam filter, which does require approval.
One thing that would probably help a
lot is if you didn't put spaces in the middle of words on your titles. That's one of the favorite tricks of Spammers to sneak flagged words (you know, like "V!@gr@"
) through filters, and the filter here is wise to it, which is probably why it thinks your posts are spam.
If you lose the extra spaces, you'll probably have a lot less trouble with it.
Also, you're now past the 10 post "probation period" where the filter looks at posts extra closely, so that should take care of the rest for you.