I applied for a job online and I didn't get approved.
Oh no, Im so sorry! They probably already filled the position and it didnt have to do with you personally!
You know, I didn't think about that. You have a good point.
Yeah! People tend to be lazy and not take down the posting once they have filled the position and the automated emails will send a canned response instead. 
They should take down the posting if the job is taken.