Can I get you to try installing a clean version of the Boundless theme onto your store. You don’t need to publish it, that way your customers will still your existing theme. Once you install the clean theme, try previewing it and see how the pricing shows up on the product within the product page. Does the issue persist or is the sale price showing along with the regular price?
If there is anything else I can help you with, please let me know.
That does look strange. It looks like we’ll need to access your account in order to resolve this issue. While we’re not able to provide account-specific support via the Shopify Community at this time, we’d be happy to continue assisting you through live chat, email, or callback. Please visit https://bit.ly/3cJkx8V and log in to your account to create a support request. Since this is the next step I’ve marked this reply as the solution for the benefit of others who may discover this topic. Thanks!