Issue in the EEC questline

In this quest:

http://www.uesp.net/wiki/Bloodmoon:Discovery_in_the_Mine

even with the pickaxe equipped, you still have the chance to "find nothing of use" in the Stahlrim deposit in the mine, which sort of breaks the quest ("sort of", because you can still attempt to mine it from other deposits in the island, but it's not mentioned anywhere in the quest text).