Multiple dates show on blog entries

I publish my set lists using blog posts in Classic. Creation dates I specify are not being reflected on the blog posts when published. In this example, the creation date is 02/01/2025 but the date at the top of the post and on the selection menu on the right is 26 January 2025. I have no idea where the 26 January date is coming from. How do I get the date at the top and in the menu on the right to be the creation date I enter?