wow I had the same problem as you. I didn't like those tutorials and thought they were poorly created because some of the tricks were not easy to understand. The stupid thing is that I had to do some of the tricks (especially the one you are stuck on) several times before it finally accepted that I did it right. I don't know why it wasn't working because I did the exact same thing as I did on the run that it worked like 10 times before and it said I was doing it wrong. Very frustrating tutorial and it took me way longer than it should have to complete.