I faced the same problem today. The number of posts when I enrolled into signature campaign was 1632 and till now I made 31 posts. Tomorrow will be payment day and I see in my profile 1655 posts only. So by my profile I made only 23 posts. I have no time to make 7 posts to finish the campaign's minimum, so I am going to stay without payment for this week and it's horrible, cause of bitcoin is my only job I have.
The Pharmacist is pretty much spot on. Don't post in unsubstantial threads that are liable to be trashcanned and don't make the bare minimum of posts just to hit your quota if you're worried about not getting paid. Had you of made an extra ten posts you wouldn't have anything to worry about and this is the problem here. People forcing themselves to squeeze out as many posts as possible just to hit their targets before the end of the month over x amount of accounts which just leads to lower and lower quality posts.