If you also see this in a Table report, I think I know what is going on there - the order of metrics in a report can affect the results when certain metrics are dependent on other metrics or when different aggregation functions are used. Metrics that rely on previous calculations can produce different outcomes if their order changes. Also, the way data is aggregated, filtered, or grouped by attributes can influence how the metrics are computed, altering the results based on the context provided by their sequence. This interplay of dependencies and context-sensitive calculations is why the metric order can sometimes change report values.