A bit OT but I just bought a jar of Aji Amarillo and they are horribly bitter and nearly heatless with no redeeming qualities bar the colour. they look right on par with these.
What source/brand and country of origin were they? Are you talking about dried or pickled? Is it possible they are over a year old? Sounds VERY atypical for true Peruvian (or Chilean/Bolivian) Aji Amarillo. I would find another source before coming to any conclusion.