I once opened a topic to rate all relationships, and duality was always 1 and activation in the top 4.
It's not odd, they are two entirely different systems. One letter off, which is not only common but, in the case of some types, typically EXPECTED, especially based on functional analysis, and you go from dual to conflictor. Does that not make sense to you?
But, for a certainty, back then,
We loved so many, yet hated so much,
We hurt others and were hurt ourselves...
Yet even then, we ran like the wind,
Whilst our laughter echoed,
Under cerulean skies...