I’m trying to understand this correctly: You put your project on sale for 50% off, then doubled the price of it so you can have it appear “on sale” despite the price remaining the same? That is illegal in many regions. If that’s what’s going on please turn the sale off and restore the price of the product, as what you are doing violates basic consumer protection laws around the world. (In addition to breaking access to people who have previously bought the game)
https://itch.io/docs/creators/quality-guidelines#sales/your-project-should-not-be-constantly-on-sale
If you intend to sell a digital product on itch.io then we expect you to make an honest effort to fulfill the promise to deliver what you collected money for. I’m sorry about the confusion with how the individually priced files work, but the most important thing right now is that you ensure that your buyers are not being withheld access to what they paid for.