I think it's probably so different because it's a fusion of me-two-years-ago and me-now. Writing styles do change, and the clash is probably what's so unusual. :D

What's REALLY funny is that I didn't realise I was putting LCIII teasers in. For me, I just wrote it with a foreknowledge of LCIII, and Dumbledore definitely wouldn't mention who was getting the DADA position ahead of that person's acceptance.