That's probably 3 good reports, 1 bad report, 1 unhandled report.
Oh, I see.
But I made my last report at least 2 weeks ago(before the one report today).
You would think, somebody would have handled it, yet
I remember getting confused by this the first time I saw it too. And also, the same thing happened to me where some reports seem to have never been "handled". My guess is that perhaps sometimes some users report a post multiple times and then only the first report gets "handled", but I've never seen the mod screen so what do I know?
There's this thread, too, for a "see also":
https://bitcointalk.org/index.php?topic=1078561.0