Hmm.. Those settings on the cards seem (so far, as far as I can tell, insert disclaimer about being new to the tablet and all) only affect the parameters of this _type_ of card. So I can say when ('before commute' and other opaque event like names) a card should show up, how important the content is .. but I haven't found any setting in Google Now that actually allows me to change the content (remove that listed location, add a different one, change my home address..), the data itself.
