Hi Notrab, I did exactly the same thing. The answer to 6 goes first to the west, then NE, then NW and W etc. There's no need to have 2 'D's in that corner.
I eventually got E2, I think I was just being slow there, and then the rest followed quite easily. But I'm a little concerned that I have not only lost ME from the top quote, but lost NEMO as well. Nothing in the preamble has prepared me for this, so I'm wondering if I have gone wrong somewhere...