I’ve noticed this for a while and I’m not sure if it is intentional or not but some ore nodes ( I usually only tend to mine ore in wvw) give the wrong amount of ore/display the wrong name for the amount of ore they give.
For example in EB’s jp in the section before the dark room, there is a Ori node that is labeled as a Rich Ori Node but it only gives 3 ores when mined.
Also I if I remember correctly, there is a mithril ore node just outside the greenside entrance of SM that only gives one mithril ore.
I figured this is a bug since there are plenty nodes that give the normal amount so I assumed that the ore isn’t reduced in wvw.