I turned off crowd control and dialed down the spam filter on a subreddit I moderate. But why is Reddit still automatically removing my posts?

I signed up on Reddit but never posted anything. Then I created a new subreddit. I am its lone moderator. I winded down the spam filter, and turned off crowd control for posts as low as possible. See screenshots:

But after I submitted a post (NOT a comment) on my own subreddit, Reddit still auto filtered and removed my post! Why? What more must I do?