The publisher refuses the same text twice on one connection within a minute, and that rule does not look at the page. When a brand posts to two Facebook pages of one account at the same time, the second page answered "no post id" and sat as a warning. Now that page waits about a minute and the post goes out to it by itself, and the check that looks for a lost post on the publisher never takes the sister page's post for its own. A post that had adopted its sister's post is corrected on the next pass.