Twenty Eleven Child Responsive Posts page

I’m stumped with making the page where I’m loading posts actually call the stylesheet and css and also act with the responsive code I’ve added for the twenty eleven child theme I’ve made. Website is here: https://pfmcabarrus.org/

All individual posts scale fine, as do all other pages. But the “Latest News” page where the posts list occurs seems to not be responding to both the css styling and the responsive code.

Any ideas?

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