Those were surface samples across the interpreted surface...

Those were surface samples across the interpreted surface expression of the vein which they drilled to determine if it continues at depth. They have shown that it does. They have only disclosed 'strong mineralization intersected over 12.5m' in a broader 25m intersection.
Plus they found more mineralization at their drill pad. This information in the last asx release was not marked price sensitive by the asx, so it may be that people are only just realizing what has happened here.