I know that there are all these theories and fun discoveries about foreshadowing of Dawn, but I just find it very weird that during the episode, Buffy was like, tra-la-la, and the next thing you know, this crazy kid is here and nobody has a freakin clue where she came from....
I mean, it's like she just shows up one day and Buffy wants to know what she is doing there, like she hasn't seen Dawn in years, and yet she still remembers when she put chopsticks in her mouth when she was ten and Buffy would say "I'm going to slay you" and how she told Riley that she didn't cry as much with him as she did with Angel...
I think it is very messed up. Not that I don't like Dawn or anyting (even though she's whiny) I just find it odd, that BOOM, she's here. And we've only got the "put the energy into human form for the slayer to protect, blah,blah,blah" and that's all we got.
And, also I agree with how do you account for the memories of others? What about Willow's and Xander's, and Angel's, and everybody else.