Footer issues in Blog posts

My footer behaves differently in certain pages. The difference is that on most pages, the footer is displayed full width like how it is configured but on certain pages, especially blog posts & a few other pages, it is displayed with extra spacing on left & right sides.
Screenshot1 is how my footer normally looks like and how it is expected to look like.
Screenshot2 is how footer looks like in blog posts & other pages.
Screenshot3 where certain icons and images are missing in the mobile version of some pages.
I am using one footer for all my pages.
How do I ensure that my footer is full width for all my pages? And is consistent across all pages?

 

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Footer issue in blog posts: https://www.textmunication.com/is-sms-marketing-software-considered-martech/