I don't think you fooled your body, because I don't think the extra servings of bread had much if anything at all to do with the weight loss. I think if you had not done anything differently at all, you would have received the exact same weight loss. I think the timing of the loss was just coincidence.
Sorry to be graphic, but just one source of variability is the weight of the food you eat (which can vary from day to day). It can take anywhere from 1 to three days for food to move through your system (more if you're constipated), so it's possible that the extra fiber in the starch got things moving - or possibly for no other reason than coincidence.
Because of the way weight naturally fluctuates, you can't conclude that the extra serving of bread or even "changing it up" had anything to do with the weight loss at all, because our bodies don't work on a one day or even weekly schedule. What you see on the scale today isn't usually a result of what you did yesterday or three days ago, or even necessarily the last week.
Expecting today's results to be an effect of yesterday or even last week's behavior, can lead to false conclusions (and even superstitious rituals).
The only way to see true patterns is by food journaling, and even then you need to look for big patterns, not daily and perhaps not even weekly patterns.