Sigh, that is the way it has ALWAYS been. You always use all torps * 10. This hasn't changed since BNT code which is about 2 years old.
This is NOT a bug so people DEAL with it. With the addition of shields that need to be hammered down it is going to be harder for those torps to get through.
Anyway you apparently attacked someone who had a ship with nothing on it to defend itself either.