Seems to be some issue with the formation from the WOWHead data and how Cart wants the data..
WOWHEAD has it listed as "Copper Vein" for example and the CART info is just "Copper"
For the conversion it looks like you need to drop anything other than "Tin" "Copper", etc. items such as "Deposite" and "Vein" need to be removed (and the space between the words ie "Copper Vein" needs to be "Copper")
the data looks great, but without converting the name correctly it shows as a Ton of "?" on the map.