im not sure it does – it seems to be a bit random, sometmes it seems to toggle between the last on for up and the second from last for down and sometimes a bit random.
what i have worked out is that when you press up arrow, it misses out the most frequent history and gives you the one before that. but if you press down arrow followed by up arrow it seems to get you on track bringing up the most recent history, each up arrow then goes back in order i think!
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