I'm subscribed to the ACRO P2 thread and I got a notification email yesterday at noon for the last post there. However, I also got a notification yesterday at 3:40pm and one at 5:00pm. Today I've gotten one at 4:50, 6:40, 6:50, 7:00, 7:10, 7:20, 7:30, and 7:40pm. There's been no new posts in the thread since the first notification, and each email is notifying me of the same post.