That is something what we call enginer english. Such form should never be used. It should be something like the/this post is published. Or topic if possible following posts will be automatic published.
Similar situation, in Finnish anyway, is number one (actually every number between 0 .. 9) should be written, not using numbers. But quite common consept is write one instead of 1 and bigger ones are numbers.
Something like 1 post is everytime doomed something what english speaking devs use, because they are too lazy to use human style — almost sorry to say that in loud. And in more generally: it is seen as american way than Using This Way In Headers, Texts 