ASMA generates quotes around the multiplier, like this:
TamedDinoClassDamageMultipliers=(ClassName="Argent_Character_BP_C",Multiplier="2.0")
But it should not. Correct syntax is:
TamedDinoClassDamageMultipliers=(ClassName="Argent_Character_BP_C",Multiplier=2.0)
Might check the "DinoClassDamageMultiplers" too.