Sale price highlighted vs Your Price

Hello good morning, I launched a product to the market with an original "your price" for a few days, in which I received 3 sales and programmed a sale price with a lower price after receiving these sales. We waited for these sales at "Your price" because we understood that this way the customer, once the "Sale price" was activated, he was going to see how the price was in promotion ("Your price" crossed out and "Sale price" as the new price). However this did not happen and the "Sale price" appears as the standard price. Could please tell us why this did happen? Thank you very much in advance!