You are so right about the surreal feel of this case. Just because there are so many unanswered questions.
In response to the waiting 30 days to report it, acting detached and unconcerned, not seeming to realize she's gone, only stating and restating that she left Caylee with this nanny.....one person posted, I think it was here, that they believe that Casey was traumatized somehow, either that Casey discovered Caylee after a tragic accident, or that Caylee was taken from her, whatever the case, that something happened which left Casey traumatized and in shock, to the point that she won't let herself remember anything except that she dropped Caylee off at the sitter on a normal day (all the way back when she used to work at Universal). Interesting theory.