[sadgpokx]

I don't have a full answer for you, but I think part of it is simply that your weight on any given day is a composite of many factors that you don't have individual visibility on.

I think it was Tril (or someone else here) who told a story about a child who was standing on a scale with a sandwich in their hand who then ate the sandwich and couldn't understand why nothing changed even though the sandwich was gone.

Although comical, I think this is a mirror of how some of us approach weight loss, focusing on a number that while related - isn't what we really care about. If we're honest, Fat % is what we all care about, and your "weight" is made up of that + so many other things.

I have a scale that estimates body fat % and muscle %, and I find this to be a very useful third dimension to add to the weight / measurements picture - but it still can't explain some truly bizarre measurements I've taken from time to time. They usually work themselves out within a week though.