You're probably right it is failed to score but your reasoning is off - it is possible to have not been first to score in all our games. [it isn't true this season but it is possible for that column to read 0]
My reasoning is fine. You can't have been first to score in none of your games this season because you have three clean sheets and only one draw. QED, you must have scored first in at least two of the games you won with a clean sheet. I never said it wasn't possible for that column to read 0 if it actually related to being first to score please log in to view this image
Funnily enough that logic doesn't hold up either. 3 clean sheets could be 0-0 i.e nobody scored. Similarly a draw doesn't indicate we scored first. So QED nothing