Eclipse, this probably isn't the answer you were hoping for, but I think it is accurate.
When Real Quiet scores the ROI, he uses the Equibase charts to gt the official results and payoffs. This is necessary because different racing jurisdictions have different rules for the way that late scratches are treated in multi race bets.
The treatment of the pick 3 you played is shown in the chart for race 10, the final leg of that pick 3. It lists 5-4-3 as the payoff for the pick 3 (and it paid $8.35 for $0.50). That means to me that if any selections were scratched, you would get a refund, not be moved to the post time favorite.
It is interesting to note (although it doesn't help you) that a pick 5 also ended with race 10. For those playing the pick 5, if they had played #1 or #8 in race 9, they would have received the PTF, which was the winning #4 Aloha West.
I don't know why they treat the scratch one way for pick 3 purposes and another way for the pick 5, but that seems to be what the chart shows.
Here's a link to the chart so you can see how it is set up. Just scroll down to race 10.
https://www.equibase.com/premium/cha...02/2022&cy=USA
As someone who dabbles in various exotic wagers, I can only encourage you to keep trying and learning as you go. Playing pick 3's, 4's and the like is like fishing for rainbow trout. It takes a lot of patience but is so satisfying when you finally catch one.