Hi @BryceT, do you know if theres an integration on the CMS? Sometime external apps may cause this issue.
One thing you may do, is change the CMS date on the blog from published date to created on , It is weird that every time you publish the website the publish date for all of the posts.
Let me know if you find any integrations in the settings, this seems to be the main issue.
If not, I would gladly help you look for the issue but I would have to look into your website.
DM me if you would like that!