The site is testing a new and improved system for puzzle ratings for a subset of members, so it's possible that's what your seeing. The UI doesn't show the changes yet, as far as I'm aware. My understanding is that many of the puzzles have a different effective rating than what is shown.
unfavorable puzzle rating
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Anyone else has the feeling that Rating for Puzzles became more unfavorable in last few weeks? It is irrelevant from how many steps they consist, the loss gets you up to -22, and the solving gives you between 5 and 9. (I was hanging around 2400-2500 easily before, now hardly getting to 2300 currently at 2150)