Not true, 'cuz Tandy and Gabrielle pointed out those girls might not have attracted to other girls, beforehand. Which is why they were thankful that they were further away and only got a small dose. So the Layla example is still valid.
Tandy exact words were "If they weren't bi-curious before, they sure are now". Because obviously she doesn't know what their orientation was before.
Even then, This was Teddi's pheromones going in overdrive as self defense. It's more potent than Teddi's normal level of pheromones. Either way, it's quite different from your Layla example. Especially since there, women weren't affected at all, not even Brook, who is attracted to women.
No, I raised a point:
That she's been noted twice for having more powers than anyone can track of.
Only one of them being valid. I like Sandi, but when it comes to Faith, she isn't exactly unbias. I mean, she probably has "Godly Beauty" as one of her powers in that catalog.
Tiffany is reliable though. Even then, it's not concrete.
How do you know whether or not she'd be able to resist the pheromones, without first knowing what all powers are?
Because if she could, Tandy and Gabby wouldn't think keeping the whole Demon Pact business to themselves would be the best course of action.
They are not dumb and they know Faith, if they thought Faith could resist the pheromones, they'd contact her immediately. Instead, they think it's safer if none of the girls with power get involved. They believe this to be the best course of action.
Even though I've repeatedly acknowledged that she has flaws?
But you don't seem to accept that she might fall prey to pheromones.
You did say we don't know for sure, but that would just mean that if it can affect her or if she's resistant are both just as likely at the moment.
But the question then becomes, why did Gabby and Tandy decide it's safer not to tell her or the others? Again, they know Faith well enough to not underestimate her, yet decided not to risk it.