Let's say you have 100% on your reports , then you report another one it stays 100% , couple of hours later it becomes 99%
I haven't looked at your reports, but based on what you've said, it stayed 100% because it hadn't been marked as a bad report yet, sometimes in the next couple hours it was. Number of reports updates immmediately, accuracy doesn't update until the report is handled.
I don't know if anyone has suggested already(sorry if yes). It would be helpful if we can see a detailed stats of our reports(one by one) or atleast a summary-like: