And here's a link to the "$2 Exacta Probables", which are, in fact, the 'odds-to-1'. So, the figures in the table are roughly half the actual $2 exacta payoffs.
https://www.kentuckyderby.com/upload...-Probables.pdf
I noticed the error because (1) I had copied the exacta table during the live betting, and the final figures are all about half the live figures, and (2) some of the supposed $2 payoffs end in 10-cent amounts.