I measure on a monthly basis and the same thing happened to me. Last month I actually had a gain during the month about 6 lbs(a muscle gain is what I'm trying to believe because I did not cheat at all). By the end of the month I had only managed to lose a whopping 1 lb for the entire month, but at my measure dday I managed to lose 10.25 inches off arms, bust, waist, stomache and thighs. I had been averaging 5-6 inches a month so this was a windfall and more than made up for the meely 1lb. Sometimes I think your body does one or the other!