Classic Naxx shoulder enchants

In the list of shoulder enchants, Might of the Scourge and Power of the Scourge are showing up, but I can never see Fortitude of the Scourge or Resilience of the Scourge. Are they missing?

Edit: Meanwhile in the WotLK section, Fortitude and Resilience show up, but Might and Power don’t …

I elaborated further in the Classic section.