For better or for worse, Korva can't see that she's the only person in the room who decided to prostrate herself, which means that instead of panicking further about that, she manages to actually listen to what the Chosen of Asmodeus is saying.
The Chosen of Asmodeus does not seem defensive or concerned about getting people to take her seriously. Secure in the knowledge that she can, actually, drag as many of them off to be tortured to death as it takes for the others to get the message, then. That makes sense.
If the Chosen of Asmodeus were talking about math, Korva would probably manage to listen in an appropriately obedient and pliable mental posture. Instead, the Chosen of Asmodeus is talking about, to a first approximation, history, and not the simple false histories made of up of disconnected facts that they teach you in school. She's talking about the real differences between peoples, across both time and space, in ability and perspective and understanding, and about how one event causes ripples across all of society and changes the shape of the whole.
Unfortunately, Korva hasn't practiced not having opinions about that. She has a lot of opinions about that, actually.
So: Keltham's world is richer and more sophisticated than Cheliax, and also richer and more sophisticated than Hell, which is many, many times more impressive, and is many times more impressive because it comes from someone called "the Chosen of Asmodeus", and therefore might actually be true. The point of this operation is to capture that real knowledge, so that it can be extracted from them and used for the Church's ends. She's going to have to have some feelings about imagining what that even means, later, but for now, rolling with it.
She doesn't know what to make of the claim that they're supposed to learn how to teach devils, given that none of them know shit compared to devils, and improving the teaching of humans is presumably much easier. If the devils didn't already know something being taught here, you would think it would be much easier for them to learn it directly than to use additional mortals as middlemen? Surely devils can themselves learn math?? Whatever. Put a pin in that, move on.
The Chosen of Asmodeus sure does also have a lot of opinions on what her listeners do and don't already know! Not that Korva wouldn't necessarily have the same impulse, if she had to explain something adjacent to this to a group of people who have, apparently, been selected almost entirely for their ability to do math, but like - not aware that heritage-optimization is possible? - okay, don't get carried away, probably heritage optimization is something different and more powerful and specific than the thing that people do when breeding dogs or horses, which is already supposedly being tried in humans in - shit don't think about that place at all, she doesn't think she's supposed to know anything about that place. Also she doesn't. Really. They're hardly rumors. Don't even put a pin in that. Focus.
Alter-Cheliax is a hard problem, obviously, if you have someone trying to see how all of the pieces are connected and checking whether the jigsaw they make together doesn't add up. It's not exactly hard to realize that the pieces of history don't all fit together at the seams, even when you're only doing normal amounts of conspiratorial - she's just going to give up on trying to think like she believes anything about the history she learned in school, okay, person-reading-her-mind, and if she wasn't supposed to adopt that posture then she will take her justly deserved punishment and return to her previous posture, but it's too much, right now, with the volume of new information about real things that are really happening and how they ought to actually connect. So she's just going to drop that, for a minute.
Anyway, even so - no, it's actually not that strange for her not to have much of a guess about what fifth-circle wizards are paid! She doesn't know that in real life! Probably it wildly varies depending on where they are and what you're paying them to do! If her actual guess would be wildly wrong, then it's fine for her alter-self to be wildly wrong, because why the fuck would being more like Taldor or immediately postwar Cheliax - which have worse education systems, by the way - cause her to know more about what fifth-circle wizards are paid?
....it would probably be weird if nobody in the group knew, though. In fairness. Which sort of just punts the problem up a level. But seriously, there isn't a singular answer to this question, and it ought to be fine to recognize that it's complicated, in alter-Cheliax and here, and if they can lean into that complexity and lack of certain knowledge - well, she's not the smartest person here, so presumably everyone has already thought of all of this and decided that this is still the best thing to tell the fresh meat to get them to act as they need to, but gods, is there a lot of emphasis on things that seem pretty obvious for a group of people for whom she is probably very mediocre.
Probably the Chosen is saying something much less obvious and she's going to end up an outsider's sex slave because she can't even figure out what it is. If she's lucky.
Ugh.