That's maddening. The really frustrating part is that this effect (and especially the "can't undo" part) is completely invisible to the user. Like I said, my wife missed out on some rather important messages about an upcoming event that we were attending because of this. (After a couple of months, when the event was a few weeks away, I believe she got a message from the organizers letting her know that they hadn't been able to contact her but did she really think they were sending spam. Much frustration ensued.)