Capsaicin is the general term for a group of capsaicinoids. Think of a cocktail and how different measurements of each ingredient can affect it. Peppers are cocktails of capsaicinoids making up their characteristics of heat, burn, linger, where it hits, etc.
Mix in some poblano which will cut the heat level but still add that jalapeno type flavor.
You can also buy tame jalapnos and no heat jalapenos these days. In a pinch, use green bell.
Yeah, mostly all online sales, plastic squeeze, zero records of manufacturing/processing, and ignorance about protocols and licenses. I know people cut corners when they start but I knew you'd see the big deal with this one. Who knows if that bottle is even food safe? That's the "applicator"...