If I click "Save and continue" -- should it publish the post?
ETA
Yes it published it. And only afterwards the drop-down list with an option "Drafts for XiXiDu" appeared.
ETA #2
This is a bug, don't punish people with downvotes for publishing their unfinished drafts.
People don't expect their draft to be published when they click "Save and continue" if there is a "Submit" button.
Go into the editing screen for your article. In the dropdown menu labeled "Post To", select "LessWrong Discussion". (You don't seem to have enough karma to post to Main, but unless I misremember, 1 karma is enough for Discussion.) Then click "submit".
The about page says you need two. thre3e might want to introduce eirself on the Welcome page; that should earn em enough karma for a discussion post.