I have created a new contact of myself and made that my card in contacts app on Mac. I asked Siri "Who am I" she pulled up a card of my old one that has all my information wrong. however on my iPhone and iPad they've pulled up the new one. (iCloud synced) I've also tried to find that old card but I cant find it. the only way is to ask Siri "who am I" and I cannot edit it or anything. when click on it, it brings me to the contacts app. and it doesnt pull up the old card.