They run twice if they're both places, right? You added them to ``All Users'' in addition to in your personal one, right? That is, if you removed them from your personal folder and left them in ``All Users'', they'd just get run once, right? Right?!? (Sorry -- got carried away)

My thought is that maybe an ``All Users\...\Startup'' folder must exist, but not necessarily have anything in it before it'll see your personal Startup folder. But that's just a guess.