Low Tolerance First Sting Poison Effect

The passives “Low Tolerance” and “First Sting”, which give 80% and 60% increased effect of poison on the first poison, don’t seem to be working correctly.
As I understand it, the effect should be a separate multiplier for the ailment, independent from magnitude, but based on testing that doesn’t seem to be the case.
Theoretically, both of these nodes on the passive tree should make the first poison on an enemy that is not currently poisoned deal 2.4× damage, but in reality that poison only deals about 1.5× damage.
So does ailment effect not act as a separate multiplier and instead get summed with magnitude, or is something else failing here?

Made some more testing.
80% increased effect give me x1.25 more poison dmg on first poison while 140% increased effect of posion gives x1.42 more posion dmg. Seems poison effect is just magnitude (have around +-200% magnitude in build)

I removed rng from tree and seems like Poison Effect is just Poison Magnitude worded diffrent. So 80% poison effect = 80% increased poison magnitude.