Section 6 of the tutorial says:
If everyone went right, you should see the picture appear at the top of the list.
Apart from it should say "if everything went right" the picture actually appears at the end of the list, because it is using push.
I had a look at the docs and if you want the item to appear at the top of the list it should use unshift.
This code does what the tutorial says:
I'm enjoying the tutorial - it is all great stuff, just sharing what I found - say if you don't need to because you know all this already.