I set a Google Alert some time ago, to search in groups. Tonight, I got an alert for old posts - predating the Google Alerts, stuff that should not have just now alerted. Is anyone else seeing strange stuff? It seems to me that Google Alerts has some memory, it knows it has pointed out a page to you, or that it pre-existed your alert. Has anyone else seen something similar?
All I can tell you for sure is that Google has been very erratic lately on all fronts. However to answer your question, this is not something I have seen so you just enlightened me to another possible Googleism.