"potential earnings" on inquiries not lining up and changing after pre-approval

I have received a few inquiries recently and when I hit the pre-approval button the price changes significantly upward. Also the spot where it shows “potential earnings” (before I hit the pre=approve button) is higher than my total nightly rate plus cleaning fees. For example, acc to my calendar, my nightly rate for 3 nights plus cleaning fees would be $1184 but it shows potential earnings on this inquiry as approx $1360. Potential earnings should be closer to $1147. Then when I hit the “pre-approve” button “potential earnings” went up even higher to $1501. I had not changed anything. The guest is now angry that I am not “honoring” my original price. Any insight? I use Pricelabs software for my pricing but it does not change dramatically like that. I do not use Aribnb’s smart pricing.

Most likely it happens when you have a discount for non refundable option.

Non refundable option is not available on pre-approval.

I had an inquiry lately that I thought did not add up, also in my favor, but then now I see in my calendar where they got the math.