change in theme after upgrading wordpress

I loved my color snap theme. I recently upgraded to WP 4.2.3 Then the first two pages of my website changed and no longer represented the theme. https://www.indoor-environmental.com Oddly enough all of the other pages are fine. A white box with text and a green border. The first two pages all all green with a 1/4″ wide white rectangle above the text. Weird. I am a simple, self taught web person. No html, css or JS. Is there a simple way to fix this?