The 4 weapons:
Honor's Withering Club
Honor's Mighty Withering Club
Honor's Withering Greatclub
Honor's Mighty Withering Greatclub

All have the following text:
...and inflicts Stage (3/5) Distress for 3 seconds.
However, the actual weapons inflict the Shaken debuff, not the Distress debuff. I'm not sure which debuff is intended. This means either it is a text bug, and all those tooltips should say Shaken instead of Distress, or it's a gameplay bug and they should actually inflict Distress instead of Shaken.

On a side note, I'm really disappointed I wasted gold and prestige (blood archeum crystals to level them) just to discover this.