So if one has newer releases that aren't discounted as much as older ones, one may want to do a sale/bundle with multiple titles at different discounts.

older game A: 80% off

older game O: 80% off

newer game N: 10% off

bundled: 10% off the sum of discounted prices

Tried to do this withing itch.io's current sale system, did a bundle with all games at 10%, but bundled as the bundled price, and then another bundle with the deeper discount on the older title only. But itch.io's sales function only displays one bundle on the game page, so the ones that are in more than one sale (deeper discounted game A and game O) don't display the bundle with the lower discount at the top of the page.