Only curses over-ride curses.
What does knock back, chill, or open wounds have to do with that?
Okay, I am thinking "simple minded" thoughts about "curses" ... "Necromancer" Skills, or Barbarian = "Stun" (curse???) from Warcry Skill (how does a BARBARIAN curse?) ... Now, Knock Back also applies with the Barbarian skill "Leap" ... it is not a curse, this also applies with a Barbarian using the "Bash" skill to "Knock back" ... it is NOT a curse ... so why does Warcry negate "Decrepify" Curse from the Necro Skill table???
I HATE "theamazonbasin" and their so called information PERSONALLY... however, I do NOT ignore what they have learnt about the game mechanics... but, they are just as old school as Arreat Summit (well maybe a little bit more informed because of the players using CD game mechanic information that was decoded when they were creating bots to play D2 back in the day and Maphacks galore... speculation, however, this is the same reason D2jsp was created in the day).