On english.stackexchange.com, I have access to the moderation tools, and I have noticed that the number of flagged posts was first 5, and now it's 4.
How is this possible? As far I can see, it's only possible to flag a post, not to remove the flag added to a post.
I tried selecting 30d, 14d, 7d, but the result is always the same. To notice that the last time I checked was yesterday, or maybe two days ago.
EDIT: The flagged posts were two, and they are still two now that the flag counter is decreased.