RSS Feed not showing current items

I have an RSS based campaign on mailchimp for my book blog and I noticed it hadn’t been sending out since the beginning of July.

I was looking at settings on mailchimp and it was telling my feed wasn’t valid. After looking in to that problem and updating Jetpack the feed starting saying it was valid again but it is still not sending out the campaign every time the blog is updated like it’s supposed to now.
The actual feed is showing the most current blog posts but when I look at the preview email on mailchimp it’s showing posts from TWO DAYS AGO and not the most current ones.. I don’t use feedburner but I do have a feedburner set up and I looked at the feedburner version of my feed and that also only shows the posts from two days ago and before that.. Does anyone know of anything I can do to get this weird issue I am having sorted out? I even tried setting up an RSS campaign on mailerlite because I thought maybe mailchimp was being a mailCHUMP and mailerlite also only displays posts from two days ago and not the most recent posts..

I don’t know understand why it’s not working! Help? ??

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