I think what you explained is not, in fact, what you have. You describe a file that has three bits of information in it: one date, one id, and one title. You assign this to an array such that element zero is $date, one is $id, and two is $title.
This is clearly not the case, or there would be no sorting to do! :-) Could you post your code (remember to surround your code with <code> tags) and some sample data?
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