Oh I get what you mean!
Is this what you see as well?
https://www.screencast.com/t/qiZ7CXmLdeB
That’s completely normal!
So for this part, it’s generated by a plugin called wp show posts, and you’ll be able to edit it’s format at Dashboard > WP show posts.
https://www.screencast.com/t/Xfm6woAd
For the email subscribe part, it’s generated by another plugin called Mailchimp, you can find it at Dashboard > MC4WP > Forms.
Basically if you see anything with a code, it’s generated by some plugins, and you’ll need to edit it in that plugin.
Hope that helps 🙂