I have always thought that there was a big element of luck in these things. As in all organizations there are those that are more conscientious than the others. So it makes a big difference who it is that picks up your file.
Perhaps an Email of congratulations or thanks is the next thing for you to do. We would very soon let them know if they were not doing their job properly so why not thank them when they get it right? Yes I do know that thanks should not be necessary for just doing what they are paid to do, but a quick few lines will not go un noticed.