Actually I believe that Daniel has actually suffered from the Island bubble curse, just like Des. We know that Des isn't the only one to have suffered from it, we know Minkowski did, and I believe that Daniel does still. We have seen him look pretty spaced out, and he often has problems remembering things that have just happened i.e. the cards. Des too had these short memory lapses due to the conscious time switches. I believe that Dan time switched and wrote in his journal aboutDes during one of these switches. He also stated (I think) that he had come into contact with radiation when talking to Des in the class room, and we know that contact with radiation causes the bubble curse. This would also explain why he was crying, he lapsed into that time and so obviously doesn't know what happened.
Of course I'm not saying that my theory is right and yours is wrong Roco, that's just how I see it
