I think a lot of it has to do with the increased cardio I've been doing lately too.I just got a new elliptical recently & have been busting out 20 min before lifting & 20 min after.These things are a lot harder to do than the stationary bike I used to do.My quads & glutes were burning the first time I tried it.I could only do 10 min at first.
Cardio = increased appetite for me too, they go hand in hand.
When I get really cranking on a diet insomnia will creep in from the hunger