Well from what I was reading, if you missed something in the application (like a line in the forms) or you did not provide enough evidence, they will not put you on a non-qualify list. They'll just send it back to you and tell you that you missed that or this.
You'll have another chance to fix it and try again. Only if it's a criminal offense reason will they take other measurments

(I asked this question to a lawyer who was helping me and other dreamers for three straight hours btw)