Hey Xena, just trying to catch up. I can second what the others have said, weight is more than fat, we are made up of a lot of other things, mostly water. So small changes in our water content can make a real difference in our weight. But that is not fat, and long term will not matter. You are losing fat, every day you are in calorie deficit you have to be. Its basic thermodynamics, you cannot live without burning calories and if you burn more than you eat the fat has to be going down.
Stick with it and your weight will follow, I know from experience it always does. In my year and 3 months of weight loss I was very consistent in what I ate, and yet some weeks I lost nothing or gained, other weeks I lost as much as 7 pounds. In the end it all worked out, as it will for you! Sticking with it is what matters, a whole lot more than day to day weight. I know that can be a hard concept to adapt, it has been for me, but it's true.
You are doing great! Keep it up.