The same thing happened to me. I was down 1/2 a lb. on Friday (my official weigh in day) and this morning I'm down another pound and a half! This, after being on a stall for about a month - go figure.
I was mostly on plan over Thanksgiving (just over 400 calories extra for the day) but I've been eating cookies & chocolate for the past several days. I always log everything on Nutridiary though and I've managed to stay pretty much under 1600 calories. I'm going to quit with the sweet stuff now while I'm ahead! I got the cookies, etc. for our son who is home from college and guess who ate them?
I hope the weight stays off till next Friday so I can change my tracker.