Date displays differently on excerpts and full blog posts

Hi Support!

I am not sure how to fix this but I am looking for some help on the date. Right now the dates on the excerpts are showing up correctly, however, if you click on an individual blog post the date shows up as the date we entered it not the date that it was back-dated to.

Any idea on how to fix this?

Excerpts Page:
Individual Blog Post Example:

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