Sorry to keep heaping small things onto your plate when Wynn's Quest is probably draining most of your attention, but I believe I've noticed a few more situations where the Calculator conflicts with the Wiki. I cannot 100% confirm which is right, but worth looking into.
1) The Zirantia Slum Remodelling investment is supposed to have different prices and stat gains depending on if it's the OZL or NUP versions. The prices on the Calculator match the wiki but the stat gains are different on both variants. It claims the OZL version gives +4 Zirantia and +1 Social and Economy while the NUP version gives +8 Zirantia and +2 Social and Economy. The Wiki claims the OZL version is +8 Zirantia and +1 Social and Economy and NUP is +4 Zirantia and +2 Social and Economy.
2) The Incubus War Guide on the Wiki claims you can get +5 Mestan RP for reducing Lillith's HP to 0 during the fight with them, regardless of when the fight takes place based on your choice during the Lustlord Node fight. The Calculator reflects this possibility in the route where you didn't help Mestan and fight him earlier, but doesn't mention it in the case of helping him and fighting him later. In this case, I suspect it's the guide that's wrong, but just making sure.
3) During The Mother's initial RP calculation, the Calculator awards +3 RP for having Fheliel maxed. The Wiki claims that this is +5. Again, not sure who's right here.
4) Small factual error in the Elven section of the Incubus War Aftermath. There's a checkbox labelled "Talk with the Mother Guard in the North-West Room". They're actually in the Northeast room. The Northwest room is where Queen Eytria is.
5) This came up in Bug Reports, but both the Wiki and the Calculator were wrong about the +1 Ardford Influence for Copying the Lecherous Priestess. That's only for interrogating her but not making a permanent copy. This is pretty important since it means most players actually had 1 less Ardford Influence than they thought they did.