are your tweets excerpts from your notes or are your notes (as seen in the notebook page, currently, in the modern era) just selected tweets?
if you see a note that's identical to a tweet, the date of the note should always be earlier. the notebook page always attempts to reflect the original date the item was written. but often things are composed and then posted to twitter immediately. i am not against this. i could and maybe should do this with songs also, somehow