While in Chapter 1, I was roaming through the wilderness and came upon the Ostrum crafting component (Wrong Spelling), and then when I ended up getting the quest from Cedric to go get that herb in the cave, I already had it, but it wouldn't let me turn it on, so I couldn't complete that quest. I still could go on, but story aspects changed due to not "getting" it quest wise. Anyone else have this happen?

you highlight the formula then look to the right of the screen and you'll see a list of item's double click the ostrum

I actually was able to make the potion fine, however, wasn't able to complete the quest dealing with bringing it back to Cedric or Triss about the quest.