Theme Options Only Impact Home Page

There appears to have been some resetting of font sizes and styles (and some adjustments to layout but one thing at a time). I went Theme Options >> General Styling >> Fonts; then set default size to 16px and defaults for Body Text and Heading Font to Open sans. However, the only page that is showing these default changes is on the home page. All other pages are defaulting to a much smaller serif font.

Please advise.

Thank you for your time and consideration.