The score on this site (that you have to be a gold member to access), and other free scores around the net, seem to have the variations in the wrong order. In these editions, the variations close with the Menuetto variation inserted as Var. 12 after the Molto Adagio, which in these versions is Var. 11.
However, in my G.Henle urtext edition, the Menuetto variation is number 8 and comes before the Eb minor variation, and the Molto Adagio is the final 12th variation. In my edition the work is closed off by a simple reprisal of the initial theme, which is not even present in the online free versions and the pianostreet score.
I have always believed that my edition is correct, especially since my favourite recording with Ronald Brautigam is performed this way.
But which way is correct? Why does some editions have a different order of the variations?