add more than one buff to sims 4 custom trait

I've set the priority of custom buffs and whims to their maximum, but it appears the custom trait can affect just the default emotion, the blocked one, and the skill/relationship boost/decay. However, I've noticed the custom traits created don't affect whims and don't produce custom buffs at all, since the standard ones always appear over them, replacing them, but I can't understand why. So here's the problem: I've always made usage of Zerbu's BAT Factory since he uploaded it, and it was working fine. I bump again this post since I'd like to come back to modding, and I really don't know what I'm mistaking. I would like to lower it to 1 or even 0 for Nymphomaniacs, since I don't think they should consider that a problem as soon as they're Flirty) by default the threshold required to access it while Flirty is 8. So I wished to ask if someone can help me to understand how to tie the test_globals (test_set_reference) of the Passionate Kiss interaction (it's my starting point) to the Flirty mood BUT with a lowered threshold for Nymphomaniac Sims (i.e. So I downloaded all the required tools and read EA's guide, but I merely understood it, due to many concepts being exposed just briefly.

However, with the BAT Factory I'm somewhat limited, since, for e.g., I can't lower the availability of some interactions (like the Passionate Kiss) and things like this, for whom tuning mods are required. Using Zerbu's Buff And Trait Factory, I was able to create my own custom trait, the Nymphomaniac trait, which makes Sims think more often to romantic interactions and woohoo.

Add more than one buff to sims 4 custom trait