fboab, I stepped on the scales this morning and had gone up almost a kilo. Now I have been sticking absolutely to the diet with no slips (January willpower is quite strong) and have been under my target calories every day for 10 days. I put this down to variations in water retention and possibly building a bit more muscle mass in my legs with the additional cycling I am doing.
Even if I weigh a kilo more, I actually feel much better/fitter/healthier this week than I did last week and it also feels as if my jeans are a tad looser. Maybe they aren't, but although initially rather disappointed by the scales (which can be a bit random in their reading) I am assuming that next week's weigh-in will show double the weight lost, hopefully.
Oh, and MyFitnessPal is very kind as if you lose weight it tells your friends "Auntie Helen has lost 0.6kg since her last weigh-in" but if you put it on it doesn't say anything!