This happened with One Tamriel. Wherever you harvest nodes now, the game gives you what is appropriate for your characters level (both actual level and crafting level based on skillpoints). It's a bit of a pain to be honest. If you've passed the point at which you get iron ore, you'll have to either create a new character to mine it with or obtain it from others.
lunawisp was my Peacebringer in City of Heroes - a game sadly consigned to history. She lives on in memory as my gaming id.
i think the nodes of the iron will progress the level of ur Blacksmithing like you gave point to use the high level meterial the first one in the list as far as i remember
so to give a example if it is 1/8 you will get the first level of iron
Finding ore of different levels depends on your own actual Level and CP and how many skill points you have into your crafting. For example as a max leveled toon with maxed crafting you can't find anything but Rubedite. But if I am max leveled but no crafting skills at all then half of all I find will be iron and the other half rubedite.
Yes, in some ways One Tamriel was a good idea, but it sucks for anyone who wants to craft for others of different levels, and who don't want to do writs to get random shipments of low level mats, that never have enough in one crate to make a full set of gear.